8
Unit 1 I Health, Safety & Ethics
Unit
1
Health, Safety & Ethics
Learning Objectives
By the end of Unit 1, learners should be able to:
• Show an understanding of computer laboratory guidelines.
• Apply the rules and regulations of using the computer laboratory.
• Adopt safety precautions when using an ICT tool.
• Demonstrate proper care of computer equipment.
• Discuss the social and economic effects of the use of computers in the context of particular
computer applications.
|
1.1 The Computer Room
The computer laboratory is a specialist room different from your usual classroom.
Many expensive electronic devices are found there, which are under the supervision of
laboratory auxiliary. For your own health and safety there are guidelines that you need to follow.
|
1.2 Introduction
Observe the picture and read
the guidelines to follow in the
computer laboratory.
(see next page)
9
1.3
| Computer Laboratory Guidelines
1.
Seek your teacher’s permission before:
• Entering the laboratory
• Using the devices (Computer, Printer, Scanner , Projector)
• Accessing the internet
• Inserting removable devices/disks
• Changing any computer settings
• Moving, changing or deleting files on the computer
2.
Always
• Adopt a proper sitting posture
• Keep the computer laboratory clean
• Maintain silence and do not disturb other users.
• Keep Food and drink away from computer equipments
• Move around the laboratory in an orderly manner
T
EPOR
R
3.
Report to your educator any:
• Loose or broken cables
• Malfunction or Damaged equipment
• Unusual activities
Quick Test 1.3
Observe the picture and
tick ( √ ) any guidelines
that have not been followed.
Statements
10
1.
Eating and drinking in the computer laboratory
2.
Good Sitting position
3.
Trailing Wires
4.
Dirty computer Laboratory
5.
Running in the computer laboratory
Tick (√)
Unit 1 I Health, Safety & Ethics
Work out : Word Processing
Go to page 100 and work out Word Task 1 only
| Adopt safety precautions when using ICT tools
1.4
Computers are safe to use if they are handled properly. It can be potentially dangerous if
misused since they operate using electricity. Learning about safety precautions is important
but adopting them is even more.
Some Safety precautions you need to adopt when using ICT tools
•
Avoid eating and drinking near computers as it can result to electric shock
for the user.
•
Computers use lots of wires and if not well arranged this may cause users
to trip over.
•
Do not insert objects in the system unit.
•
Overloading of power socket may cause overheating and even fire.
•
Switch off computer before connecting or disconnecting any cables.
•
Opening the system unit while the computer is ON is life threatening.
•
Don’t switch your computer ON if socket is damaged.
•
Make sure your computer is on a strong table as some parts are heavy and can cause
injury if they fall on people.
•
Place your computer in a well ventilated space to prevent overheating of equipment.
•
Do not try to repair your computer as you are not trained for.
SAFETY
FIRST
11
Work out : Word Processing
Go to page 101 and work out Word Task 2 only
Quick Test 1.4
Safety Precautions
4
Fill in the CROSSWORD
ACROSS
1. too high temperature
3
1
DOWN
1. no room and no .................
1
2
2. ................. shock
3. ................. may cause tripping
over when no well arranged
4. too many connections in a
socket
12
Unit 1 I Health, Safety & Ethics
Work out : Presentation
Go to page 118 and work out Presentation Activity 2 only
1.5
| Guidelines for proper care of computer equipments
1. D
o not switch your computer on and off too quickly,
wait at least 2 minutes.
2. Scan any disks with an antivirus software before using them. 3. Do not use your computer during heavy rain or lightning. 4. Never leave your computer in direct sunlight.
5. Always shut down your computer after use. 6. Computers should be kept in well ventilated rooms.
need to look
for one
7. Protect your computer from dust and liquids.
13
Quick Test 1.5
Find and circle
OFF
1.6
SCAN LIGHTNING SUNLIGHT COMPUTER
C
O
M
P
U
T
E
R
A
I
S
O
S
X
L
G
B
X
Z
P
I
C
L
I
G
H
T
N
I
N
G
T
A
R
F
C
K
U
I
Y
T
E
J
N
A
S
U
N
L
I
G
H
T
F
A
O
F
F
U
N
A
P
G
Z
T
R
| Social and economic effect of the use of computers
Communication
Activity 1.6
Development of science and technology has
direct effect on our daily life as well as in our
social life. Computers are used in various fields.
Some of the major computer application fields
are discussed below.
Business
Work
Fields
Discuss with you educator.
Education
14
Banking
Unit 1 I Health, Safety & Ethics
1.6.1
| E-Commerce ( Business)
Electronic commerce means the buying and selling of goods and services using the internet.
Exercise 4: Observe the table below which shows two ways to buy a product.
Steps
without e-commerce
with e-commerce
Choose
the product
Buy
the product
Delivery of
the product
Activity 1.6.1
Observe the pictures
Now we can discuss about the differences between
e-commerce and traditional shopping.
Use these hints
- Place where the products are displayed?
- Modes of delivery?
- Types of payment?
15
How are the products displayed?
TRADITIONAL COMMERCE
E-COMMERCE
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
How are the products delivered?
TRADITIONAL COMMERCE
E-COMMERCE
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
What is the mode of payment?
TRADITIONAL COMMERCE
E-COMMERCE
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
Did you know
Tools required
When doing an e-commerce transaction the following are needed.
•
•
A computer, a tablet PC or a smart phone.
Internet connection.
16
Unit 1 I Health, Safety & Ethics
Quick Test 1.6.1
Using the statements given below, classify them as benefits or drawbacks.
Statements
1
2
3
4
5
6
7
8
9
10
11
12
13
14
You can choose from a variety of products from different countries.
Not everyone is connected to the Internet.
The product received may not be the same as ordered.
You stay at home and do your shopping.
There is a risk of hacking (unauthorized access).
It may be difficult to return the good or get help from the seller.
It is easier and quicker to check for the best price.
The shop owner saves on warehouse and other operational costs.
There is a risk of virus infection.
The product is cheaper.
You may have to wait a long time before you receive the product.
You can shop anytime (24 hours a day and seven days a week).
You are not able to try the item before you purchase it.
No need to travel to the shop.
Benefits
1. .......................................................................................................................................................................................................
2. .......................................................................................................................................................................................................
3. .......................................................................................................................................................................................................
4. .......................................................................................................................................................................................................
5. .......................................................................................................................................................................................................
6. .......................................................................................................................................................................................................
7. .......................................................................................................................................................................................................
Drawbacks
1. .......................................................................................................................................................................................................
2. .......................................................................................................................................................................................................
3. .......................................................................................................................................................................................................
4. .......................................................................................................................................................................................................
5. .......................................................................................................................................................................................................
6. .......................................................................................................................................................................................................
7. .......................................................................................................................................................................................................
17
1.6.2
| Teleworking ( Work)
Home
Office
The use of ICT has changed the traditional work practices. Now,
it is possible to do office work from home using computers and
telecommunications facilities.
This way of working is called teleworking or telecommuting.
Tools required
Personal Computer or Laptop and Internet connection.
Benefits of Teleworking
Benefits to Employers
Benefits to Employees
• They save on rental and office running costs.
• They work in a relaxed environment.
• T ravel expenses and other travel-related
problems are reduced.
• No travel costs
• Better work/family life balance.
• Handicapped persons may also work.
Drawbacks of Teleworking
Benefits to Employers
• E mployers do not have direct control over
teleworkers.
18
Benefits to Employees
• They do not meet other workers.
• T hey may be tempted to spend time on
personal work.
Unit 1 I Health, Safety & Ethics
Quick Test 1.6.2
Fill in the blanks with the following words:
Travel Family
Costs
Teleworking
Handicapped
Working from home is called ........................................... Many people prefer to work this way because
they can look after their .......................................... at the same time. .......................................... persons can
also work. There is no need to .......................................... to the office. Moreover, employers are happy
because they save on office running ...........................................
Traditional banking
In Traditional banking, a person goes to a bank
to do the following transactions:
•
•
•
•
•
•
Open/close account
Deposit/withdraw money
Check balance
Exchange of foreign currency
Money Transfer
Apply for loan
Find out
Accompany your parents next time
they go to the bank and note down
your observations.
Did you know
To perform transactions,
you need to call in person
and bring along your ID
Card to prove your identity.
Usually you have to queue
up and wait for your turn.
Observation Notes
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
19
1.6.3
| E-banking
E-banking also known as online banking (or Internet banking) refers to the use of internet to
perform bank transaction such as:
•
•
•
Transfer money from one account to another.
Online payments (of bills or purchases
through e-commerce).
Check account balance.
Did you know
User ID/Username is an
identification used by a person
to access a computer system.
Password is a secret key/code
The bank provides an E-banking web-site. Users must have User ID and password.
Password is used to avoid unauthorized access to the account.
E-banking allows cashless transactions.
Tools needed
INTERNET
Customers with their devices
20
Bank servers to store information
about customers.
Unit 1 I Health, Safety & Ethics
Find out
Visit an online banking website
of a local bank and note down
your observation
Observation Notes
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
Services provided by E-banking to customers
Check
bank balance
Transfer
money
Pay bills
online
Services
Create
new accounts
Apply for
loan
Print
bank statements
21
Benefits of E-banking
Benefits to Customers
Benefits to Bank
• Transactions can be done from home
• Banks can attract new customers
• Transactions can be done at any time (24/7)
• Bank can operate 24 hours a day
• No need to stand in queues
• No need to employ many staff
• Can request for bank statement instantly
• Save costs on rent and salary
• Can apply for loan
Drawbacks to Customers
Drawbacks to Bank
• N
eed to have internet facilities to access web
site
• N
eed to buy expensive computers and
specialist workers to develop web site
• Fear of hacking and fraud
• I f web site is not working , customers will
not have access to their account
• N
eed to be aware of fake E-mail that can
steal personal information
Quick Test 1.6.3
1. Unscramble the letters below to make seven words related to E-BANKING. Then use the
letters in the boxes in the new words to solve the E-BANKING RIDDLE!
CUNAO
___ C ___ ___ ___ T
OLIN
___ N ___ ___ E
SAEC
___ C ___ ___ S SORPWD
___ A ___ S ___ ___ ___ NETTRI
___ N ___ ___ ___ E ___
MAELI M ___ ___ L
An identification used by a person to access a computer system.
___ ___ ___ ___ ___ ___
22
Unit 1 I Health, Safety & Ethics
2.
S tate whether the following statements are related to traditional banking or E-banking or
both.
Put a tick (√) in the appropriate column(s). Traditional Banking
E-Banking
Pay bills
Open/close account
Use of ID card
Deposit/withdraw money
Apply for loan
Check balance
Use of Login (e.g. UserID)
Money Transfer
1.6.4
| ATM (Banking)
Did you know
A teller is someone who works
for a bank and is responsible
for doing bank transactions.
Instead of going to a bank to perform some transactions, you can use an ATM (Automatic teller
machine). It is a machine located outside the bank or at another location.
23
Services offered by an ATM
An example of an ATM
Screen
buttons
Display
Screen
Receipt
Printer
Cash
Dispenser
Card
Reader
Deposit
Slot
Speaker
??
we have
speakers
here?
Keypad
A customer needs his/her bank card with
a Personal Identification Number (PIN) to
perform the following operations:
•
withdraw cash
•
transfer funds between accounts
•
view account balances
•
deposit cash and cheques
•
refill prepaid mobile phone
•
pay bills
Find out : ATM Simulator
Visit this web site in your computer laboratory or at home.
https://handsonbanking.org/htdocs/en/k/#/en/k/sa/8.html
Work out : Presentation on ATM
Go to page 120 and work out Presentation Task 2 only
Quick Test 1.6.4
ATM has also its limitations. Tick (√) the services not offered at an ATM.
To top up your mobile phone account
To open and close customer accounts
To use coins
To pay CWA monthly bills
To view the last five transactions done in your account
To apply for a loan
24
Unit 1 I Health, Safety & Ethics
1.6.5
| E-learning ( Education)
E-Learning (Electronic learning), means using a digital device and electronic resources to learn.
Tools needed for e-learning
To be able to correctly carry on with e-learning a student need to have:
•
•
•
•
A computer / laptop/ tablet PC/ smart phone
Speakers or headphones A microphone Any specific software or website
Find out
Visit an E-learning web site at
school or at home.
E.g. Khanacademy.com
Tick (√) what you have observed after visiting the website.
Statements
True
False
1. To top up your mobile phone account
2. To open and close customer accounts
3. To use coins
4. To pay CWA monthly bills
5. To view the last five transactions done in your account
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Quick Test 1.6.5
Circle the tools required to perform E-learning.
Computer
1.6.6
Book
Headphone
Scanner
| Video conferencing (communication)
Components of a video conferencing
Camera
TV or Monitor
Microphone
Speakers
Videoconferencing allows people from different locations to see and talk to each other using
computer and Internet facilities.
Tools required
PC or Laptop, microphone, webcam, speakers, and Internet connection.
26
Unit 1 I Health, Safety & Ethics
Benefits to Videoconferencing
• Large savings in travelling.
• N
o time wasted in travelling to other
cities/ countries.
• M
eetings can be organised at short
notice.
• Disabled people are not disadvantaged.
• I t is safer (from terrorist attacks/
accidents).
Drawbacks to Videoconferencing
• S ome problems like poor sound and
images or network failure may arise.
• I t is less personal than face-to-face
meetings.
• Important documents cannot be signed.
• T ime zones are different in different
parts of the world.
• Language barrier.
Devices
Think
Which other devices, apart from
your computer, can be used for
videoconferencing?
1. ...........................................................................................
2. ...........................................................................................
3. ...........................................................................................
4. ...........................................................................................
Quick Test 1.6.6
Match Column A with Column B
Column A
Column B
Videoconferencing
PC, microphone, webcam, speakers, Internet.
Benefit of videoconferencing
Network failure.
Drawback of videoconferencing
People from different locations see
and talk to each other.
Videoconferencing tools
No travel expenses.
27
END OF UNIT QUESTIONS
Exercise 1
Complete the crossword below by referring to the pictures.
I
N
S
R
S
R
V
R
S
Fill in the blanks below with the appropriate words related to the pictures given above.
1.
No Food & ........................................... should be allowed in the computer laboratory.
2.
Do not insert metal objects such as ........................................... into the computer casing.
3.
Ask permission to the teacher before inserting any .......................................... into the computer.
4.
Ensure that there are no trailing ........................................... in the computer laboratory.
5.
Know the location of the ........................................... extinguisher in your laboratory
28
Unit 1 I Health, Safety & Ethics
Exercise 2
State whether the following statements are True or False:
1. Eating chewing gum is allowed in the Computer lab.
2. Pupils should seek the teacher’s permission before using computers.
3. Adjustable chairs should be used in the computer lab.
4. Insert metal objects into the computer casing.
5. Pupils may touch broken cables.
Exercise 3
Fill in the blanks with the following words:
permission
bag
computer
eats
task
instructions
cables
quietly
immediately
dangerous
Shayna is a student in Grade 7. She listens carefully to all the .......................................... given by her
teacher. She never .......................................... or drinks in the computer laboratory. She keeps her
.......................................... on the rack provided, sits .......................................... in front of the ...............................
designated by laboratory auxiliary and does the .......................................... given by the teacher.
She does not touch .......................................... or electric sockets because she knows that they can be
........................................... She always asks for the teacher’s .......................................... before using her pen
drive. In case of any problem she informs her teacher ...........................................
Exercise 4
List some safety precautions you take when using your computer at home or at school.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
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END OF UNIT QUESTIONS
Exercise 5
Re-arrange the following list of steps to withdraw money from an ATM.
An example has been done for you.
Enter your PIN
Choose the amount you want by pressing
the screen buttons or use pad to enter amount
1
Insert your ATM card
Take your cash
Select “Withdrawal” from the list of transactions
Take your card
Take your receipt
Exercise 6
E-banking Word Search
See how many of the 5 words related to e-banking you can find in the puzzle below.
List down the words.
D
I
R
E
S
U
30
T
Y
B
A
N
K
A
C
C
E
S
S
Y
E
N
O
M
C
O
N
L
I
N
E
E
N
F
N
B
D
1. ...........................................................................................
2. ...........................................................................................
3. ...........................................................................................
4. ...........................................................................................
5. ...........................................................................................
Unit 1 I Health, Safety & Ethics
Exercise 7
a) Define the term e-banking.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
b) List down 3 services provided by e-banking.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
c)
Distinguish between e-banking and traditional banking.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
d) State 2 benefits and 2 drawbacks of e-banking to customers.
BENEFITS :
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
DRAWBACKS :
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
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END OF UNIT QUESTIONS
e) State 2 benefits and 2 drawbacks of e-banking to the bank.
BENEFITS :
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
DRAWBACKS :
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
Exercise 8
Fill in the blanks with the words given in the box below
Teleworking
E-commerce
ATM
Video Conferencing
E-banking
E-Learning
1.
........................................... is when a person or a business, buy or sell over the Internet .
2.
To work from home or a location close to home using computers and telecommunications
facilities is called ............................................
3.
........................................... refers to the use of internet to perform bank transactions.
4.
........................................... means to use a computer and ICT tools to learn from home.
5.
An ........................................... is a machine located outside the bank or at another location.
6.
........................................... allows people from different locations to see and talk to each other
using computer and Internet facilities.
32
Unit 1 I Health, Safety & Ethics
Exercise 9
Speakers
Printer
Webcam
Microphone
Mouse
Internet
Connection
Personal
Computer
Tick (√) the appropriate tools required to perform the following online activities
Teleworking
E commerce
ATM
Video Conferencing Ebanking
E- Learning
33
34
Unit 2 I Computer Operations and Fundamentals
2
Unit
Computer Operations
and Fundamentals
Learning Objectives
By the end of Unit 2, learners should be able to:
• Distinguish between hardware and software.
• Describe the components of a computer system.
• State the use of various computer peripherals.
• Distinguish between application and system software
• Describe various types of computers
• Demonstrate an understanding of the unit of measurement of CPU speed
• Demonstrate an understanding of binary data
2.1
| Hardware and Software
A computer system needs both hardware (physical parts) and software (computer programs).
Hardware is the name given to the physical parts of the computer system.
The parts can be:
Internal (found inside the system unit) or
External (connected to the system unit).
2.2
•
| Internal Hardware
Motherboard
The motherboard is the central circuit board. All components plug into the motherboard.
PCI Slot
(Can connect sound cards etc)
Back Panel with
connections fo peripherals
and USB Memory
CPU Slot
Graphics card slot
Slots for
Hard Disk Drives
and DVD-ROMS
RAM (Memory)
Slots
35
Other hardware connected to the motherboard
•
Processor (Central Processing Unit)
The CPU is the brain of the computer and is
responsible for all data processing.
•
Internal Memory (RAM and ROM)
Random Access Memory (RAM) and Read
Only Memory (ROM) are two types of internal
memory used to store computer data that
can be directly accessed by the CPU.
•
Power supply
Sends power through cables to
motherboard and other components.
•
the
Graphics Card
A device that plugs into the motherboard
and enables the computer to display images
on the monitor.
•
Fan
It keeps the CPU cool and stops it from
overheating.
•
Sound Card
A sound card allows the computer to produce
sound as well as allows users to connect
microphones to the system.
36
Unit 2 I Computer Operations and Fundamentals
2.3
| External Hardware components
External hardware components are called peripheral devices. Computer peripherals are
devices that are connected to a computer system to expand its abilities.
They may be input devices, output devices or storage devices.
Input
Devices
Central Processing
Unit
Output
Devices
Storage Devices
Peripheral
Peripheral
Peripheral
OUTPUT
INPUT
Peripheral
Peripheral
Peripherals
37
2.3.1
| Input/output an storage Devices
External hardware components are called peripheral devices. Computer peripherals are devices
that are connected to a computer system to expand its abilities.
They may be input devices, output devices or storage devices.
Input Devices
Devices used to enter data and
instructions into the computer. Some
examples are keyboard, mouse,
barcode reader, scanner, joystick,
touch pad, digital camera and
microphone.
Output Devices
Devices used by the computer to
show us information in a suitable
form. Some examples of output
devices are monitor, printer, speakers
and headphones.
Storage Devices
Devices used to store data for later
use. Some examples of storage
devices are hard disks, optical discs,
USB Flash drives and memory cards.
38
Unit 2 I Computer Operations and Fundamentals
Work out : Word Processing
Go to page 104 and work out Word Task 3 only
Quick Test 2.1.3
1. State whether the following statements are True or False:
(a) The computer can work with hardware only.
(b) The fan keeps the CPU cool.
(c) All components plug into the motherboard.
(d) A printer is an example of a storage device.
(e) A peripheral device may be an input device.
2. Match Column A with Column B. An example has been given.
Column A
Column B
Computer peripherals
Allows the computer to produce sound.
Sound card
Enables the computer to display images.
ROM
Physical parts of a computer system.
Hardware
Input/Output/Storage devices.
Graphics card
The main circuit board.
Motherboard
Internal memory.
39
Suggested Activity : Identifying computer parts
Ask your teacher to show you the parts inside a system unit.
Work out
Go to page 103 and work out Spreadsheet Activity 4 only
2.4
| Software
Software is the name given to computer
programs which provide instructions that tell
the computer hardware what to do and how
to do it.
Did you know
A program is a set of
instructions to perform
a specific task.
Software Examples
Word Processor
40
Spreadsheet
Computer Games
Operating System
Unit 2 I Computer Operations and Fundamentals
2.4.1
| Two main categories of software
Software is classified as system software and application software.
Software
System
software
Application
software
The system software manages and controls the computer whereas the application software
enables the user to do a specific task.
System software is the most important software that runs on a computer. It is a set of programs
that controls the computer hardware and provides a platform for running application software.
Examples of system software:
•
Operating systems (OS)
Software that acts as an interface between the user and the computer system.
E.g. Microsoft Windows, Android, Linux and Mac OS X.
•
Utility programs
Software designed to help analyze, configure, optimize and maintain the computer.
E.g. Anti-virus software, disk defragmenter, file manager.
Application software refers to programs designed to help the user perform specific tasks.
41
Examples of application software:
• W
ord processing software
To create documents such as letters, reports
or assignments.
• Spreadsheet software
To organize data in rows and columns,
perform calculations and present data in
the form of charts and graphs.
• Graphics software
To create and colour drawings.
• Presentation software
To display information in the form of a slide
show.
• Web browser
To access the Internet and view web pages.
• Games package
To play computer games.
Quick Test 2.4.1
1.
Fill in the blanks by selecting words from the given list:
Important
game
software
system
specific
application
(a) Computer hardware cannot function without ...........................................
(b) The two categories of software are .......................................... software and ..........................................
software.
(c) A computer .......................................... is an example of software.
(d) System software is the most .......................................... software that runs on a computer.
(e) Application software helps the user to perform a .......................................... task.
42
Unit 2 I Computer Operations and Fundamentals
2. Match Column A with Column B.
Column A
Column B
System software
Presentation software.
Operating System
Anti-virus software.
Application software
Example of operating system.
Utility program
Acts as a user interface between the user
and the computer system.
Android
Manages and controls the computer.
2.5
| Bits and Bytes
The word bit is a shortening of the words "Binary digIT", that is “0” and”1” (The “bi” in binary
means two) For example: 1011. Everything you say to a computer has to be put in terms of
these two numbers.
A BYTE is a group of 8 bits. It is used to represent a character.
COUNTING THE NUMBER
OF BITS AND BYTE
Did you know
A character in computing terms can be a
letter, a number or any other characters and
even a blank space is a character.
Human beings have 10 fingers and we have
been used to count numbers in group of tens.
Computers, however, operate using the base-2
number system, also known as the binary
number system.
For example:
Each character is represented by one byte
and each byte is made up of 8 bits. So count
the number of byte and the number of bits
So computers use binary numbers, and
therefore use binary digits in place of decimal
digits. Everything you say to a computer has to
be put in terms of these two numbers.
43
First byte
Second byte
Third byte
Fourth byte
Fifth byte
P
O
W
E
R
8 bits for a character
Letter “P” = 8 bits
Letter “O” = 8 bits
Therefore adding the 5 letters
Letter “W” = 8 bits
(5bytes) from the word power
Letter “E” = 8 bits
gives you 40 bits
Letter “R” = 8 bits
Quick Test 2.5
How many bytes and bits can you count in the word COMPUTER?
Number of bytes = ........................................... bytes
Number of bits = ........................................... bits
How many bytes and bits can you count in the sentences below?
i)
Using computer is fun.
Number of bytes = ........................................... bytes
ii)
12th March 1968 – Mauritius Independence day.
Number of bytes = ........................................... bytes
iii) 50, St. Georges street, Port-Louis.
Number of bytes = ........................................... bytes
44
Unit 2 I Computer Operations and Fundamentals
2.6
| Types of computers
Did you know
Computers can be classified by size and power. These types of computers are:
1.
2.
3.
4.
Microcomputer
Mini computer
Mainframe computer
Supercomputer
1. Microcomputer
•
•
•
•
•
•
•
Also known as Personal Computer (PC)
Easy to use
Small in size
Low cost
Low Computing power
Only one user at a time
Used for personal applications in everyday life
Types of Microcomputers:
Smart phones
Desktop PC
Laptop
photo?
Tablette
Palmtop
Personal Digital Assistant
2. Minicomputer
•
•
•
•
•
Medium sized and bigger than microcomputers
Average cost
Average Computing power
10- 60 users at a time
Used in small business companies, banks or supermarkets
45
3. Mainframe Computer
•
•
•
•
•
Large size and bigger than minicomputer
High cost
High Computing power
100 users at a time
Used in large business organizations
such as insurance Companies or universities
4. Super Computer
•
•
•
•
Largest and fastest
Most expensive
Very High Computing power
Used in very large sized organization
such as weather forecasting and space
exploration.
Quick Test 2.6
1. Classify the different types of Computers starting from the Fastest to the slowest
Types of Computers
2.Complete the table below showing the difference between the 4 types of computers
from the given list.
Size (Smallest, Large, Largest, Medium)
Cost (Expensive, Cheap, Cheapest, Most Expensive)
No. of Users (10, 100, 1)
Size
Microcomputer
Minicomputer
Mainframe
Supercomputer
46
smallest
Cost
No. of Users
Unit 2 I Computer Operations and Fundamentals
2.7
| Speed of the CPU
CPU clock speed, or clock rate, is measured in Hertz — generally in gigahertz, or GHz.
Gigahertz (GHz)
Higher units of measurement
1 KHz = 1000 Hz
1 MHz = 1000,000 Hz (1 million)
1 GHz = 1000,000,000 Hz (1 billion)
Did you know
1 instruction per Second = 1 Hertz (Hz)
100 instructions per Second = 100 Hertz (Hz)
Find out : Steps to know CPU speed
Follow these steps
MyPC-> right click -> properties
Note the processor speed. Your processor model and speed will be displayed. The speed
is measured in gigahertz (GHz). This is the speed of a single core of your processor. If your
processor has multiple cores (most modern processors do), each core will be this speed.
SCREEN SHOT
to redo
Avatar : note down the speed of the computer you are using
47
END OF UNIT QUESTIONS
Exercise 1
need clearer screen shots
/ jpeg
Write the number that corresponds to the hardware component in the above picture.
Motherboard
Hard disk drive
RAM
Expansion cards/ graphics card/
sound card/ network card
Monitor
Mouse
CPU
Power supply
Keyboard
Optical disk drive
48
Unit 2 I Computer Operations and Fundamentals
Exercise 2
a) Differentiate between hardware and software.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
b) Distinguish between system software and application software.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
Exercise 3
2. Match each of the following peripherals to its use:
Keyboard
To produce hardcopies.
Mouse
To enter text.
Microphone
To display images.
Monitor
To move the cursor on the screen.
Printer
To store files
Compact disc
To input sound.
49
END OF UNIT QUESTIONS
Exercise 4
Complete the crossword below.
1
2
Complete the crossword below
3
ACROSS
2. Software to perform a specific task.
3. Software that manages the hardware.
DOWN
1. Physical parts of a computer.
3. Computer programs.
50
Unit 2 I Computer Operations and Fundamentals
Exercise 5
Fill in the blanks with words from the given list:
supercomputer
peripheral
Fan
sound
byte
software
hertz
ROM
microcomputer
hardware
(a) In order to function, a computer requires both hardware and ............................................
(b) ........................................... is the name given to the physical parts of a computer system.
(c) RAM and ........................................... are two types of internal memory.
(d) A ........................................... keeps the CPU from overheating.
(e) A ........................................... card allows the computer to produce sound.
(f ) External hardware components are called ........................................... devices.
(g) A ........................................... is a group of 8 bits used to represent a character.
(h) A ........................................... has low computing capacity.
(i) A ........................................... is the fastest and most expensive computer.
(j) The speed of a computer is measured in ............................................
Exercise 6
2. Match the following:
CPU
1000,000,000 Hz.
1 GHz
A microcomputer.
Supercomputer
Responsible for all data processing.
Laptop
A set of instructions.
Binary digit
Used for space exploration.
Program
0 or 1.
51
END OF UNIT QUESTIONS
Exercise 7
Name the 4 types of computers.
1. ........................................................................................................................................
2. ........................................................................................................................................
3. ........................................................................................................................................
4. ........................................................................................................................................
Exercise 8
a) List three input devices from the list.
Microphone
..............................................................................................................................................
..............................................................................................................................................
Inkjet printer
..............................................................................................................................................
Speakers
b) List three output devices from the list.
..............................................................................................................................................
..............................................................................................................................................
Pen drive
Keyboard
..............................................................................................................................................
DVD
c)
List three storage devices from the list.
..............................................................................................................................................
Optical mouse
..............................................................................................................................................
..............................................................................................................................................
52
LED Monitor
Unit 2 I Computer Operations and Fundamentals
Exercise 9
Calculate the number of bytes in the following sentence:
I like playing computer games.
= .................................. bytes.
Exercise 10
What do the following acronyms stand for? An example is given.
(a) ROM
Read Only Memory
..................................................................................................
(b) CPU
..................................................................................................
(c) PC
..................................................................................................
(d) RAM
..................................................................................................
(e) MHz
..................................................................................................
Exercise 11
Unscramble the following words. The first letter is given.
Example: BADEOORHMRT :
MOTHERBOARD
(a) AEMNMARIF:
M .............................................................
(b) ARTOEFSW:
S .............................................................
(c) TREZH:
H .............................................................
(d) NIRYAB:
B .............................................................
(e) CNIUMTRMIPOE:
M .............................................................
(f ) HEWDAARR:
H .............................................................
(g) BYET:
B .............................................................
(h) LPRIREAPHE:
P .............................................................
53
54
Unit 3 I Internet
Unit
3
Internet
Learning Objectives
By the end of Unit 3, learners should be able to:
• Define a computer network
• Explain the benefits and disadvantages of computer a network
• Define a web browser and URL
• Distinguish between the Internet and WWW
• Demonstrate understanding that every web resource has an address on WWW
• Define a search engine
• Use refined keywords in web searches
• Check the History of web visits
• Define an email
• Differentiate between an email and a postal mail
|
3.1 The Internet
Think
Hello friends. I am back again.
• Do you chat with your friends
or relatives?
• Do you send them emails?
• Do you search for information on
the web ?
• Do you watch movies online?
• Do you download songs from
websites?
In this Unit we will learn about Internet and how it offers the
services mentioned above questions.
55
|
3.2 Computer Network
Did you know
You and your friends
form part of a friendship
network. You may also
have heard about phone
networks, school networks
and social networks.
The picture below shows another type of network - a Computer Network.
A Computer Network is a set of computers or electronic devices connected together.
A computer, printer, scanner, mobile phones or a file server can form part of the network. The
connection between devices can be done via cables or without wires (wireless). Connected
devices share information and resources among themselves in a network.
56
Unit 3 I Internet
An example of a simple computer network
Key terms
Note: A file server is a
specialised computer
which manages resources
in the network.
Printer
Personal Digital Assistant
Desktop PC
Laptop
Mobile Phone
Network transmits resources such as documents, pictures and videos among devices. Nowadays
we use computer networks to communicate, for entertainment, shopping and to do business.
Benefits of Computer Networks
Drawbacks of Computer Networks
• U
sers share data and files stored on the
file server.
• C
ables and file server increase cost of
Setting up a network
• I t allows sharing of expensive devices. For example, A printer can be shared
among several users.
• T he network stops working if the file
server breaks down
sers can run soft wares that have been
• U
installed on the file server
n infected computer spreads virus to
• A
other computers.
• N
etwork users can exchange messages
instantly .
• N
etwork Manager and Technicians are
needed to run the network. 57
Quick Test 3.2
1. Read the statements and circle the correct answer
a) What of the following can be shared in a network?
A. Music
B. Videos
C. Documents
D. All of the above
b) A Server is A. A person who manages a network.
B. A specific computer who manages the resources in a network.
C. A user sharing information in the network.
D. A cable used to connect devices in a network.
c)
Which of the following may form part of a network?
A. Network Cable
B. Laptop
C. Scanner
D. All of the above
d) A network may stops working if
A. a network user is absent from work.
B. the file server breaks down.
C. there is no printing device.
D. the connection is wireless
58
Unit 3 I Internet
2. Tick (√) to indicate whether the following statements are True or False
True
False
A network consists of computers only.
Viruses can spread to other computers in a network.
Resources cannot be shared between users.
A user sends video files to other network users.
A network always connect devices through cables.
It is cheap to build a computer network.
|
4.3 The Internet
What is the Internet?
The internet is the world’s largest computer network.
The internet connects together millions of computers all over the world.
Once you are connected to the internet you can get access to many services.
The most common of which are :
•
•
The World Wide Web (WWW)
Electronic mail (E-Mail)
59
Activity 1
Identify services
of the internet.
With the help of your teacher identify
two other services provided by the internet.
Write your answers here
Service 1. ....................................................................................................
Service 2. ....................................................................................................
|
4.4 The WWW
The World Wide Web is the most used service on the Internet.
The WWW is the collection of millions and millions of documents called Web pages.
Each web page can be a combination of text, pictures, audio clips, video clips or animations.
Web pages have connections or links to other Web pages.
Going from one web page to another web page, by clicking on a link is called surfing the WWW.
What is a web browser?
•
A web browser is software that allows access to the internet and view web pages.
•
Examples of web browsers are:
•
Mozilla Firefox
•
Google Chrome
•
Microsoft Internet Explorer / Microsoft Edge
Activity 2
Identify devices to view
web pages
List three other devices other than a computer, which
can be used to view webpages on a web
Write your answers here
Device 1. ....................................................................................................
Device 2. ....................................................................................................
Device 3. ....................................................................................................
60
Unit 3 I Internet
|
4.5 Uniform Resource Locator
We read earlier that the WWW is the collection of all webpages on the internet, and to go from
one page to another we click on a link. So how does the browser know which webpage to
display when a link is clicked? Every webpage on the WWW has an address. This address is called the Uniform Resource
Locator (URL).
For example, the URL of The University of Mauritius is www.uom.ac.mu
When you click on a link the browser gets the URL of the webpage pointed to by the link.
Knowing the address, the browser can fetch and display the webpage requested.
Activity 3
Finding URL of companies
Look at advertisements on newspapers or magazines and
find out the URL of two companies or businesses.
Write down their names and the corresponding URL
Name of company
URL
........................................................................... ..............................................................................................................................
........................................................................... ..............................................................................................................................
........................................................................... ..............................................................................................................................
|
4.6 Search Engines
A search engine is a web-based program that looks for information based on keywords.
The results are sent to the web browser with a mix of web pages, images, videos and other
types of files.
Examples of common search engines include:
www.google.mu
www.bing.com
www.yahoo.com
61
Write down your observation in the spaces
below.
Activity 4
Visit search engines web site
Observation notes
With the help of you teacher,
visit the 3 search engines
mentioned above.
................................................................................................
................................................................................................
................................................................................................
Quick Test 4.6
Name a few other search engines that you may know.
.........................................................................................................................................................................................................
.........................................................................................................................................................................................................
.........................................................................................................................................................................................................
|
4.7 Using keywords in web searches
Keywords are words or short phrases that an internet user types in their search engine so that
the website looks for matches.
Keywords may return millions of results and out of it most would be unwanted. Refining
keywords will give less search results but will be more focused on what the user is exactly is
looking for.
Activity 6
Searching the WWW
Enter the number search results for the following keywords typed in your search engine.
Keywords
Mauritius
Mauritius Institute of Education
“Mauritius Institute of Education”
“Mauritius Institute of Education 2017”
62
Number of results
Unit 3 I Internet
What have you observed in the number of search results as you progressed down the table?
.........................................................................................................................................................................................................
.........................................................................................................................................................................................................
.........................................................................................................................................................................................................
Activity 7
Web Browser History
The web browser’s history
allows users to view web site
visited previously.
Follow the steps to check the history of your browser:
a)
Click here to open
the control menu
b) Bring your mouse pointer on the history option
c) A sub menu will appear and click on the first option to open the history list.
63
d) A list of websites will appear with the most recently viewed first. This page will the website
visited, the date it was visited and the time the website was last viewed.
Click on any website name to re-open it.
|
4.8 Distinguish between the Internet and the World Wide Web
(WWW)
The Internet
WWW (World Wide Web)
The internet is a network of networks.
The WWW is a collection of all web pages
found on the internet.
It consists of all physical parts of the
network.
Your web browser allows you to view the
contents on the WWW.
( computers, modems, servers,
telephone lines, antennas, fiber optics,
and satellite links)
(web pages, websites , URL and hyperlinks)
64
Unit 3 I Internet
|
4.8 Electronic Mail (E-Mail)
What is Email?
Email is the sending and receiving of messages through the internet. To start sending emails
you will need:
•
A computer/other devices (e.g. tablet, Smartphone) connected to the Internet.
•
An email address (e.g. tipiyu@gmail.com)
•
A web browser (e.g. Google Chrome, Internet Explorer, Mozilla Firefox)
Some examples of email providers:
Parts of an Email Address:
tipiyu2@gmail.com
User name:
a unique name that
identifies a user.
Domain name:
a company or organization name
that provides the email service.
The @ symbol is read as “at” and can be typed
by holding down the SHIFT key while typing the
number 2 on the keyboard.
Both the sender and the receiver must have an e-mail address. An e-mail address is associated
with an e-mail account. User has a user name/user ID (e.g. tipiyu25) and a password.
The password prevents unauthorized access to the mail.
65
Log into your email provider's website.
For example, if you have a Gmail account, visit mail.google.com.
•
ou will need to log in with the account you have with that service.
Y
If you don't have an account, you can create one from a variety of free email services.
The user will have to enter his/her
username, following the @ symbol
and email account e.g. tipiyu2@
gmail.com and Click Next.
Then the user needs to
enter his/her password and
Click Next.
Did you know
Remember passwords
should be a secret known
only to you.
Sign out using Gmail account
The following screen will appear after entering the email address and password. To sign out of
his/her account, the user should click on the symbol found at the top right hand corner of the
screen.
need clearer screen shots
/ jpeg
66
Unit 3 I Internet
Create an email account
Follow these step-by-step instructions to create a Gmail account
Step 1 : Go to Google
Open up your internet browser and go to the Google home page: http://www.google.mu
and then click Gmail at the top right corner of the page
Step 2 : Click Create an account.
You’ll now be in the ‘Sign in’ section.
As you don’t have a Google account yet, you need to create one.
67
Step 3 :
To create up your new account, Google needs some information about you like your first and
last names. The ‘choose your username’ is the unique email address, which will be placed before
‘@gmail.com’. Type an email name into the ‘choose your username’ box and then fill out the rest
of your information. Then click Next step.
Step 4 : Verification
To get to the next steps you will need to Accept Google's privacy and terms first, once you have
read it click on I Agree.
68
Unit 3 I Internet
Step 5 : Completing the setup
You can complete the setup by clicking Continue to Gmail.
You will be automatically redirected to Gmail's dashboard and once you have read all of the
information your Gmail is now ready to use. By clicking Go to Gmail, you will be able to access
your Gmail account.
69
Activity 8
Creating an E-mail address
With the help of your teacher, create an email address.
Note: In order to have a Gmail Account, you must be above 13. Some other email providers
also restrict their services. However, you may create a Live account.
4.8.1
| Common E-mail features
Consider the following screen from Gmail account
1. Find an email to open
hen you log into your email account, you will be taken to your inbox.
W
This is where all of your new email messages appear.
Click a message in your inbox to open it.
70
Unit 3 I Internet
2. Reply to a message
Click the "Reply" link to compose your message.
3. Compose/send an email
Click here to send an email
71
The following screen will appear:
Cc (Carbon copy) : Click on it if you want to send a copy of your email to another recipient.
Bcc (Blind Carbon Copy) : Click here to send a copy of your email to another recipient without the
addresses appearing in the email.
72
Unit 3 I Internet
•
If the user has clicked on the attachment icon, the following screen will appear:
4. Check your "Spam" folder occasionally
S pam email is mainly advertising and scam email messages. These messages are moved to the
Spam folder, where they typically sit for 30 days before being deleted. Check the folder occasionally,
as sometimes legitimate mail may also be found in the Spam folder.
73
5. Delete or sort read messages
fter you read an email and reply to it, either sort it into a folder or delete it from your inbox. This will
A
help keep you organized.
6. Don't click any unknown links
Email is one of the most popular ways to trick people into giving out personal information. Never
click links unless you trust the sender. Its best to be cautious, as viruses on the sender's computer
can cause them to send infected emails without knowing.
Work out : Word Processing
Go to page 105 and work out Word Task 5 only
74
Unit 3 I Internet
4.8.2
| Differences between E-mail and postal mail
l
Emai
E-Mail
Postal
• E -mail can be sent or received at any
time.
• L etters/parcels can only be sent during
working hours
• E-mail is cheaper.
• Need to buy stamps/envelope.
• E-mail messages are sent instantly.
• Takes time to deliver letters/parcels.
• S ame message can be sent to many
people.
• I ndividual copies must be sent to
recipients.
• Files can be sent as attachments.
• N
o attachment can be sent. However,
to send a parcel, the user pays extra
charges.
• R
eceived e-mail can be forwarded to
someone else.
• Cannot forward letters/parcels.
• Viruses can spread through e-mails
• There is no risk of viruses.
• User may receive spam mails.
• Less chances of getting spam mails
• U
ser must have computer and internet
facility.
• No electronic equipment is necessary.
75
Quick Test 4.8
1. Refer to table 1 above; classify the benefits and drawbacks of email over postal mail.
One is done for you.
Email
Drawbacks
Benefits
E-mail can be sent or received at any time.
Viruses can spread through e-mails.
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
Postal Mail
Benefits
Drawbacks
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
............................................................................................
76
Unit 3 I Internet
2. State whether the following statements are True or False:
(a) Messages are sent faster using email.
(b) Email is easier to send without an Internet connection.
(c) Email is used to exchange messages over the internet.
(d) Only the sender should have an email address.
(e) When sending an email, files can be sent as attachments.
3. Match Column A with Column B. An example has been given.
Column A
Column B
Trash
Contains undesired electronic messages
Email
Contains messages already sent
Inbox
Contains deleted messages
Email address
is the sending and receiving of messages
through the internet.
Spam
Contains messages not yet sent
Drafts
Contains incoming messages
Sent Mail
tipiyu@gmail.com
77
END OF UNIT QUESTIONS
Exercise 1
A computer Network is a set of computers connected together.
(a) List two benefits of computer Networks.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
(b) List two drawbacks of computer Networks.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
Exercise 2
Fill in the CROSSWORD
ACROSS
1
2
3
A
3. a vast network linking smaller
computer networks worldwide
4
T
M
5
2. Contains undesired electronic
messages
O
5. an email provider
DOWN
1. Contains messages not yet sent
4. an electronic message
78
Unit 3 I Internet
Exercise 3
a) What is an email?
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
b) Give 2 advantages of email over postal mail
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
c)
Give 2 disadvantages of email over postal mail.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
d) T hree items from the list below are needed to send and receive email. Choose the
appropriate ones.
Internet access
speakers
email address
i.
........................................................................................
ii.
........................................................................................
paint
email account
iii. ........................................................................................
79
Exercise 4
(f ) The internet is
Circle the correct answer.
A. A game
(a) What does WWW stands for?
C. A private network
A. Wide world works
B. A global network
D. A software
B. World Wide Web
C. World web wide
D. Web world wide
(b) What is an email attachment?
A. Help menu
B. Word processor
A. A forwarded email
C. E-mail program
B. A file sent with an email
D. Search engine
C. A reply to an email
D. A deleted message
(c) W
hich of the following should not be
done, if you don’t want your computer to
get infected with a virus sent by email?
A. Make regular backup
B. Open all attachments sent to you
C. Only open attachments from people
you know and trust
D. Regularly check your inbox
(d) Which of the following is not necessary to
access the internet?
A. A Modem
(h) Chrome is an example of
A. System software
B. Search engine
C. Web browser
D. Hardware
(i) Which one is a valid e-mail address?
A. http://www.tipiyu.mu
B. tipiyu@gov.mu
C. http://www.tipiyu@gov.mu
D. www.tipiyu.mu
(j) W
eb sites visited previously
are stored in:
B. A keyboard
A. Recycle Bin
C. A connection to the internet
B. History
D. A web browser
C. Email address
(e) The Inbox folder in an email is used
to keep ____________
A. Incoming messages
B. Messages already sent
C. Trashed messages
D. Incomplete messages
80
(g) Which of the following would you use
to find information on the internet?
D. Downloads
Unit 3 I Internet
Exercise 5
a) What do the following stand for?
i.
URL
................................................................................................
ii.
WWW
................................................................................................
iii.
E-mail
................................................................................................
(b) Many people use the internet to download songs and movies. Mention 3 other uses of the internet.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
(c) Underline the correct answer:
When logged onto the Internet one needs a Web [Connection, Search, Browser] where to enter
the [WWW, URL, CPU] of the page to visit. To send an e-mail, one needs an e-mail [address,
page, website].
(d) List the names of three Search Engines.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
(e) List the names of three Web Browsers.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
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(f ) Look carefully at the picture below and answer the following questions by entering the
correct number.
i.
Where do I click to view incoming messages?
.............................................................................................................................................................................................................
ii.
Where do I click to create a message?
.............................................................................................................................................................................................................
iii. Where do I click to delete an e-mail?
.............................................................................................................................................................................................................
iv. Where do I click to reply to an e-mail?
.............................................................................................................................................................................................................
v.
Where are deleted messages stored?
.............................................................................................................................................................................................................
vi. Where do I click to view undesired messages?
.............................................................................................................................................................................................................
Exercise 6
Explain the following terms with example where appropriate.
(a) E-mail
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
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Unit 3 I Internet
(b) Internet
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
(c) Network
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
Exercise 7
State whether the following statements are True or False:
(a) A Computer Network is a set of computers
or electronic devices connected together.
(b) Messages are sent faster using email.
(c) Passwords must be shared among friends.
(d) A web browser is software which is used to view web pages and websites.
(e) Web pages have connections or links to other Web pages.
Exercise 8
Complete the sentences below with the words provided:
spam
file server
internet
keywords
web page
(a) A ................................ ................................ is a specialised computer which manages resources in
the network.
(b) The ............................................. is the world’s largest network.
(c) Each ................................ ................................ can be a combination of text, pictures, audio clips,
video clips or animations.
(d) Internet user types ............................................. in their search engine so that the website looks for
matches.
(e) ............................................. contains undesired electronic messages
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Exercise 9
(a) What is an attachment?
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
(b) I want to e-mail a friend whose e-mail address is adiyush@gmail.com. Follow the instructions
using the screen below.
i.
Enter the e-mail address of my friend in the appropriate place.
ii.
The subject of the e-mail is Wedding Venue - enter it in its appropriate place.
iii. I want to send a file as attachment, which button should I click?
Circle the appropriate button.
iv. What is Bcc?
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
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Unit 3 I Internet
(c) Put a tick (√) next to the names of Web Browsers.
Google
Internet Explorer
Mozilla Firefox
Altavista
Yahoo
(d) Put a tick (√) next to the URL’s (addresses) of Search Engines.
http://www.yahoo.com
http://www.govmu.org
http://www.google.com
http://www.askjeeves.com
http:// www.mie.ac.mu
Exercise 10
Refer to the diagram below and answer the following questions.
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(a) What is the name of the sender of this email?
.............................................................................................................................................................................................................
(b) Who is the receiver of the above e-mail?
.............................................................................................................................................................................................................
(c) T he following email address is to be sent as a carbon copy to ppogba@gmail.com. Write this email address in the above picture.
(d) What is the subject of this email?
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
(e) What does this icon indicate in an e-mail?
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
(f ) Circle the button which needs to be clicked so that the sender can send more attachments.
(g) What is the difference between typing an e-mail address in the Cc field and typing an
e-mail address in the Bcc field?
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
Exercise 11
Give three reasons why most people prefer e-mail over postal mail.
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
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Unit 3 I Internet
Exercise 12
(a) What is a computer network?
.............................................................................................................................................................................................................
.............................................................................................................................................................................................................
(b) All the computers in the network are connected to a special computer called a file
..................................................
(c) The internet is an example of a ................................................. , which connects millions of people,
computers or devices all over the world.
Exercise 13
Match Column A with Column B. An example has been given.
Column A
Column B
Web browser
a web-based program that looks for information
based on keywords
Network
address of a web page
Search engine
to access the Internet and view web pages.
WWW
Contains deleted messages
URL
is the collection of millions and millions of
documents called Web pages
Internet
a set of computers or electronic devices connected
together
Trash
is a very large network which connects millions of
people , computers or devices all over the world.
E-mail address
are words or short phrases that an internet user
types in their search engine so that the website
looks for matches.
Drafts
Contains messages not yet sent
Keywords
adiyush@live.com
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88
Unit 4 I Word Processing
Unit
4
Word Processing
Learning Objectives
By the end of Unit 4, learners should be able to:
• Adjust properties of images to fit them well within the document
• Manipulate drawings and shapes
This Unit includes a recap of the basic word processing skills learned in previous grades.
|
4.1 Word Processing
A word processor is a program used to create
a document. For example if we want to write an
essay, to write a letter or produce a report, a word
processor can be used.
To word process a document, you need a device
(For example a computer) and a word processor.
A word processor enables someone to create
a document, format the document, edit the
document and save it electronically on a disk
unlike the old days where typewriters were used.
Did you know
The first major advance from manual writing
was the typewriter. Henry Mill, an English
engineer, is credited with its invention
(eighteenth century).
Christopher Latham Sholes, with the assistance
of two colleagues, invented the first successful
manual typewriter in 1867.
Format refers to changing the text appearance.
For example, using different font style, font size,
text alignment etc…
WordStar, best-selling software released in
1979 by Micropro International, was the first
commercially successful word processing
software program for microcomputers of the
early eighties.
Edit refers to changing the content of the
document. For example, changing a word or a
sentence.
Other early word processor programs worth
noting were: Apple Write I, Samna III, Word,
WordPerfect and Scripsit.
There are many word processors. The most
common is Microsoft Word, but there are others
like Google Docs, OpenOffice, LibreOffice etc…
and there were earlier word processors, Electric
Pencil.
Source: https://www.thoughtco.com/
wordstar-the-first-word-processor-1992664
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|
4.2 A Recap
Once you open a document in MS-Word, a screen similar to the one below will appear.
Identify the different parts that have been labelled in the screen shot below.
Paragraph Formatting Activity
To position text on a page is called text alignment
and they are on the Home ribbon, in the Paragraph
grouping.
See the opposite picture and identify it
as you open Microsoft word.
To complete the first activity, make sure:
1. You select the HOME tab.
2. Point your mouse on the BULLETS icon.
The first one has been done for you
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Unit 4 I Word Processing
Labelling Task 1: The first one has been done for you.
Icon
Icon name
Bullets
Use to
Make a bulleted list.
Make a numbered list.
Align text to the left.
Align text to the center.
Align text to the right.
Automatically align text to both the left
and right margins.
Font Activity
To change the font style, font size, font colour etc..,
the font grouping is used.
Again for this activity, point your mouse
this time on the font ribbon on MS-Word
toolbar and label each icon below.
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Labelling Task 2:
Icon
Icon name
Bullets
Use to
Change the font face.
Change the font size.
Increase the font size.
Decrease the font size.
Make selected text bold.
Italicise selected text.
Underline selected text
Create small letters below the text baseline.
Create small letters above the line of text.
Change text colour.
Congratulations you managed to jump from page 4 to page 100.
Before starting with the practical tasks it is recommended to create a folder
with the help of your teacher.
Give the folder a meaningful name that you can identify and save all your
practical tasks in the folder you created.
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Unit 4 I Word Processing
Word Task 1 : Simple text document - Computer laboratory guidelines
In this task you need to produce a minimum of five
computer laboratory guides from unit 1 as below.
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Word Task 2 : Consolidated activity – Working safely with a computer.
Using Word, write some important safety measures
that you can recommend to your friend to adopt when
using a computer.
Follow the instructions below to complete word task 2.
1. Click on the insert button
2. Select text book
Computer Safety Rules
A Computer is safe to work with but should be handled properly.
There are certain safety rules to observe and some of these rules are:
1. A computer should not be operated during thunder and lighting.
2. Computers should be kept away from dusty environments.
SAFETY
RULES
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Unit 4 I Word Processing
Word Task 3 : Input and output devices
In this task, you need to list some basic input and
output devices and their function.
You can add more input or output devices
if you wish.
Save the document as: Input and output
devices
Input & Output Devices
A computer needs some basic input and output devices for someone to work with.
SOME BASIC INPUT DEVICES
a) The most important input device is the KEYBOARD. The keyboard is used to type. Text like
letters, numbers and punctuation marks can be entered using the keyboard.
b) The second important input device is the MOUSE. Mice (plural of mouse) are used to make
selection on the screen. We have to click the mouse to get it do some job for use.
c) Another input device though not necessary but is fun to play computer games is the
JOYSTICK.
Some Basic Output Devices
a) The most important output device is the MONITOR, also called visual display unit. The
monitor displays whatever you type on the screen.
b) A second output device that can be used is the SPEAKER. The speaker produces sound that
adds fun to computer games.
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Word Task 4 : Using word-art and inserting shapes
In this task, you will learn how to use shapes
and add text and colour to shapes.
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Unit 4 I Word Processing
Word Task 5 : Writing message to be attached as E-mail
In this task, you will write an E-mail to a friend who was
absent for your birthday party explaining him/her the fun
you had on that occasion.
You may attach any photos or videos.
SEEK THE HELP OF YOUR TEACHER
From your name
Dear your friend’s name,
I was very sad to receive your email regarding your inability to come to my birthday party. I celebrated
my 11th birthday as you were aware on the 20th December. The birthday party was arranged at our
residence at 6pm.
The garden was beautifully decorated with flower-pots and decorated lamps. My dad bought everything
from the supermarket and all our friends and my relatives were present except you. There were lots of
sweets and cakes. There were also many games and music.
I cut the cake after blowing the candles. Everyone sang the birthday song. Tasty dishes, including
refreshments were served. Everyone enjoyed the party and play games till late at night. Everyone
brought me wonderful gifts and the best gift was from my dad. He gifted me a quad copter. It was really
a nice gift. We really enjoyed the party and had much fun.
How I missed you on that day! You my best friend, but I understand that you had fever and could not
attend the party. Anyway, I wish you recover very soon.
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END OF UNIT QUESTIONS
Exercise 1
Circle the correct answer.
(a) A word processor would most likely be used to do
A. keep an account of money spent
B. do a computer search in media center
C. maintain an inventory
D. type a letter
(b) The ............................. gives quick access to commonly used commands and tools.
A. Status bar
B. Ribbon
C. Menu bar
D. Title bar
(c) A character that is raised and smaller above the baseline (e.g 5th ) is known as
A. outlined
B. raised
C. superscript
D. subscript
(d) To erase a character to the right of the insertion point, press the ............................. key.
A. cancel
B. backspace
C. delete
D. Spacebar
(e) From which menu you can save a document?
A. Insert Menu
B. View Menu
C. Format menu
D. File Menu
Exercise 2
Complete the sentences below with the words provided:
Word processor
Formatting
Delete key
Enter
Space bar
Bold
Backspace key
1.
The .............................................. ribbon is used to change the appearance of text.
2.
To change line, the .............................................. key is pressed and to leave a space between two
words, the .............................................. is pressed.
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Unit 4 I Word Processing
3.
To change
4.
Microsoft office word is a ...............................................
5.
Changing the appearance of a document is called ...............................................
Exercise 11 ??
Read the following invitation card and answer the questions that have been set to you.
Circle the correct answer.
(a) What feature has allowed the text labelled X to be inserted?
A. TextArt
B. ClipArt
C. WordArt
D. FontArt
(b) The picture labelled Y can be inserted through.
A. TextArt
B. ClipArt
C. WordArt
D. FontArt
(c) What type of formatting has been applied to the text labelled Z?
A. Centre and Bold
B. Align Left and Bold
C. Bold
D. Align Right and Bold
(d) On which button must we click in order to change the font size of a text?
A. Front button
B. Font size button
C. Undo button
D. Font button
(e) In the date the th in ‘29th October 2017 is in
A. Italics
B. Subscript
C. Superscript
D. Font button
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100
Unit 5 I Spreadsheet
Unit
5
Spreadsheet
Learning Objectives
By the end of Unit 5, learners should be able to:
• Work with formulae
This Unit includes a recap of the basic spreadsheet skills learned in previous grades.
|
5.1 Recap
What is a spreadsheet?
A spreadsheet is a computer program that
displays a grid into which we can enter text,
numbers or formulae.
The spreadsheet grid is made up of rows
and columns. Observe the Microsoft Excel
spreadsheet window.
Recall
Hello Dear friends.
We are going to learn spreadsheets in this
unit. Before we start lets us recapitulate what
you have done in grade 4 till grade 6
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The Microsoft Excel window is very like Microsoft Word window. The main differences are shown
in the figure above.
Cell address
Every cell in a spreadsheet has an address given by its column letter followed by its row number.
When you open a blank Excel spreadsheet, it is known as a workbook and each spreadsheet in
a workbook is called a worksheet.
Spreadsheet Activity 1 : Identifying cells, rows and columns
text text text
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Unit 5 I Spreadsheet
Spreadsheet Activity 2 : Creating a Simple Formula
text text text
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Spreadsheet Activity 3 : Using Cell Address in a formula
text text text
Did you know
What is the benefit of using cell address
in a formula?
It allows you to work with different values without
having to change or rewrite the formula.
If you want to work with different values just change
the contents of the cells that have the values and you
have no need to change the formula.
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Unit 5 I Spreadsheet
Spreadsheet Activity 3
text text text
105
Spreadsheet Activity 4 : Using Functions
text text text
106
Unit 5 I Spreadsheet
Spreadsheet Activity 5 : Using Functions
text text text
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Unit 6 I Presentation
Presentation
Learning Objectives
By the end of Unit 6, learners should be able to:
• Work with charts and tables
• Use advanced animations
This Unit 6 includes a recap of the basic spreadsheet skills learned in previous grades.
GETTING STARTED WITH MICROSOFT POWERPOINT
A Power point presentation is a file on a computer made up of a group of slides. Text, images,
tables, sounds and videos can be added on the slides.
A slide is a single page of a presentation.
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Presentation Activity 1
text text text
110
Unit 6 I Presentation
Presentation Activity 2
text text text
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Presentation Activity 3
text text text
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Unit 6 I Presentation
Presentation Activity 4
text text text
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Presentation Activity 5 : Import chart from Spreadsheet to presentation
text text text
114
Unit 6 I Presentation
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Presentation Activity 6 : Animating a ball
text text text
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Unit 6 I Presentation
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Unit 7 I Multimedia
Multimedia
Learning Objectives
By the end of Unit 7, learners should be able to:
• Create simple animated clip
|
7.1 What is an animated clip?
An animated clip is a series of images that are played in sequence. The result of this animated
clip is a short movie clip.
Activity : Flip book
Hi! Have you heard the term flip book?
Refer to picture below.
Materials needed:
• Pencil
• Ruler
• Paper
• Stapler or Tape
Want to try it?
With the help of your teacher follow
the steps to create a flip book.
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Step 1
Cut out the images below into 10 individual
images from your book.
(Go to ANNEX page xxx)
Step 2
Stick the pictures to form a small book.
Flip the small book and tick (√) your observation by reading the
statements below.
Statements
The picture does not move
When I flip the picture moves
When I flip faster the picture moves to create a small animation
>?? photo of the cartoon here? or?
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Tick (√)
Unit 7 I Multimedia
|
7.2 Creating an animated clip using software
Congratulations you managed to do the previous activity of flip book.
We will now learn how to create animated clips using the computer
and appropriate software.
The software we are going to use is Windows Movie Maker. There are several other software
that you can explore on your own.
|
7.3 Exploring Windows Movie Maker
To open Windows Movie
Maker click on the icon
found on your desktop.
Window Movie Maker Window
Storyboard
The storyboard allows you to import and arrange the images in a sequence.
Preview
The Preview includes controls you can use to preview the movie you are working on in the
Timeline.
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|
7.4 Creating a simpe movie clip
We will create a movie on the different examples of Microcomputers. Follow the steps below.
Step 1 : Download photos
Download the following photos on the internet:
(1)
Mobile phones
(2)
Tablet PC
(3)
Desktop computer
(4)
Laptop
(5)
PDA
Examples of the photos are :
(you can download your own photos)
Step 2 : Import images on Storyboard
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Unit 7 I Multimedia
Preview movie clip
Step 3 : Edit movie clip
Editing a movie involves the following:
1. Increase or decrease the length of the movie
2. Insert animation
3. Insert sound
4. Insert Title.
5. Add text to pictures
Edit Length of movie for 7 seconds
• Step 1 : Double click on one of images. The screen below should appear. Focus on duration
which is 7 seconds. This means the image will be displayed seconds.
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• C
lick on the drop down and change the duration to 2 seconds.
Repeat the same step for all images.
• The duration of the movie should be 10 seconds now.
Insert animation
To insert animation you need to click on the animation tab.
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Unit 7 I Multimedia
A series of transition will be offered to you. You can choose any one of them and click on apply
to all.
Here again you can choose the duration of the animations.
Insert Sound
• To insert sound you need to click on HOME tab and choose add music.
• Choose the music you want to add and click on open
• A green strip should appear as shown below.
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• Play your movie again (Tipiyu dancing)
Insert Title
To add a title at the start of the movie click you need to click on Home Tab and Title icon. An image with black background will appear. Inside the image there is a test box in which it is written
“My Movie”.
Edit Text box
Change the content of the text box to “Examples of Microcomputers”
You can effects by clicking on the option available on the window.
You can change the background colour if you want.
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Unit 7 I Multimedia
Add text to pictures
• Click on the second image on your story board.
• Click on Caption icon on your window movie maker window.
• A textbox will appear on the screen.
• Delete the content of the text box and type “Desktop Computers”.
• Repeat the above steps for all pictures.
• Preview your movie
Step 4 : Saving your movie clip
Your movie clip can saved in two formats:
Saving your movie will allow you to open it and edit it. The procedure is as follows:
Click on save icon Insert a name and click on save button.
This file will open using windows movie maker only.
Activity : Creating a movie
on types of computers
With the help of your teacher create a movie clip
on types of computers.
Hints: The title of the movie clip is “Types of computers”
Download pictures on the 4 types of computers and
design the movie clip
127