GRADE 9
NATURAL SCIENCES
REVISION BOOKLET
QUESTION PAPER A – Page 2
QUESTION PAPER B – Page 13
QUESTION PAPER C – Page 23
MEMORANDUM A – Page 35
MEMORANDUM B – Page 39
MEMORANDUM C – Page 42
ON
LIFE AND LIVING (TERM 1)
MATTER AND MATERIAL (TERM 2)
The Periodic Table of Elements is provided at the back of the booklet.
Natural Sciences Grade 9
2
FS Revision Booklet Term 1 and 2
REVISION QUESTION PAPER A
SECTION A
QUESTION 1
1.1
Various options are provided as possible answers to the following questions.
Choose the answer and write only the letter (A – D) next to the question number
(1.1.1 – 1.1.10) in the ANSWER BOOK, e.g. 1.1.11 D.
1.1.1 A group of similar cells performing the same function is called ...
A
B
C
D
a system.
an organ.
a type of tissue.
a cell.
(1)
1.1.2 Which of the following forms part of the musculoskeletal system?
A
B
C
D
Cartilage
Kidneys
Small intestine
Brain
(1)
1.1.3 Digestion begins in the ...
A
B
C
D
mouth.
small intestine.
large intestine.
stomach.
(1)
1.1.4 Arteries, veins and capillaries are the ... in the circulatory system.
A
B
C
D
tissues
organs
vessels
cells
(1)
1.1.5 The tiny female sex cell that unites with a male sperm to form a
zygote or a fertilized egg:
A
B
C
D
Ovary
Ovum
Gonad
Cervix
(1)
Natural Sciences Grade 9
3
FS Revision Booklet Term 1 and 2
1.1.6 The total number of atoms contained in 5NaHCO3 is ...
A
B
C
D
20.
25.
30.
35.
(1)
1.1.7 The diagram below shows four test tubes, each containing an iron nail
under different conditions.
Study the information provided and answer the question that follows.
Boiled water +
oil layer
Salt water
Air
Air +
calcium chloride
Which ONE of the nails will form the most rust in the shortest time?
A
B
C
D
Test tube A: A nail submerged in boiled water covered by oil.
Test tube B: A nail submerged in salt water.
Test tube C: A nail in a test tube surrounded with air only.
Test tube D: A nail surrounded with air and partly submerged
in calcium chloride crystals.
(1)
1.1.8 A chemical reaction is taking place in each of the following test tubes.
Test tube 1
Test tube 2
Test tube 3
Test tube 4
Ca(OH)2 + HCl
CaO + HCl
Ca + HCl
CaCO3 + HCl
Natural Sciences Grade 9
4
FS Revision Booklet Term 1 and 2
Hydrogen gas will form as a product in:
A
B
C
D
Test tube 1 and 4
Test tubes 2 and 3
Test tube 3
Test tube 4
(1)
1.1.9 Which ONE of the following chemical equations correctly represents
the reaction between magnesium hydroxide and hydrochloric acid?
A
B
C
D
Mg(OH)2
Mg(OH)2
Mg(OH)2
Mg(OH)2
+ 2 HCl
+ HCl
+ HCl
+ 2 HCl
→
→
→
→
MgCl2 + 2 H2O
MgCl + H2O
MgCl2 + H2O
MgCl2 + 2 H2 + O2
(1)
1.1.10 The following table contains substances which are commonly found in most
households with their respective pH values.
Which ONE is the most BASIC/ALKALINE substance?
A
B
C
D
SUBSTANCE FOUND IN MOST
HOUSEHOLDS
Bleach
Vinegar
Oven cleaner
Distilled water
PH VALUE
13,1
3,2
11,2
7,05
(1)
[10]
1.2
Give ONE word/term for each of the following descriptions. Write only the correct
word/term next to the question number (1.2.1 – 1.2.5) in your ANSWER BOOK.
1.2.1 The small structures that are found inside a cell and each performs
a specific function.
(1)
1.2.2 Tough, inelastic tissue which attaches muscles to bone.
(1)
1.2.3 The process when an egg cell is released.
(1)
1.2.4 The inflow and outflow of air in the lungs.
(1)
1.2.5 The condition where bowel movements occur less frequently and
consists of hard, dry faeces.
(1)
[5]
Natural Sciences Grade 9
1.3
5
FS Revision Booklet Term 1 and 2
Choose the item from COLUMN B that matches the description in COLUMN A.
Write only the letter (A – G) next to the question number (1.3.1 – 1.3.5) in the
ANSWER BOOK.
COLUMN A
COLUMN B
1.3.1 Arrangement of all the known elements.
A
Combustion
1.3.2 Process taking place when vinegar is mixed
with bicarbonate of soda.
B
Magnesium
C
Alkaline
D
Periodic Table
E
Non metal
F
Neutralisation
G
Indicator
1.3.3 … + oxygen gas → acidic oxide
1.3.4 A substance that changes colour depending
on the pH of the solution in which it is
placed.
1.3.5 Burns with a blinding white flame in oxygen
gas.
[5]
TOTAL SECTION A:
20
SECTION B
QUESTION 2
Tsholo studied the following cell under a microscope. Study the diagrams of the cell
below and answer the questions that follow.
FIGURE A: Micrograph of the cell
2.1
2.2
FIGURE B: Diagram of the cell
Is the above an example of a plant or an animal cell? Give TWO visible
reasons for your answer.
(3)
Identify number 5 in FIGURE A and name ONE function of this organelle. (2)
Natural Sciences Grade 9
2.3
6
FS Revision Booklet Term 1 and 2
The organelles in FIGURE A are also represented in FIGURE B. Find the
corresponding organelles and complete the table below.
Write only the question number (2.3.1 – 2.3.2) and the answer in the ANSWER
BOOK.
NAME OF THE
ORGANEL
Cell membrane
2.3.2
2.4
NUMBER OF THE
ORGANELLE IN
FIGURE A
2
1
NUMBER OF THE
ORGANELLE IN
FIGURE B
2.3.1
6
(2)
Explain why there are so many of organelle 1 present in a cell.
(1)
[8]
QUESTION 3
The diagram below shows the human body systems. Study the diagram and answer the
questions that follow.
1. Digestive system
2. __________ system
7. Reproductive system
Human
body
systems
Distributes the oxygen
that is carried by the red
blood cells to all parts of
the body.
3. Respiratory system
6. Nervous system
4. _________ system
5. Excretory system
3.1
Give the name of the system numbered 2.
(1)
3.2
Name TWO processes that occur in the system numbered 2.
(2)
3.3
Which system is deafness, blindness and short sightedness associated
with?
(1)
Give the names of TWO body structures in system 4 that work closely
together to provide support and allow movement in the body.
(2)
3.4
Natural Sciences Grade 9
7
FS Revision Booklet Term 1 and 2
3.5
What will happen if the filters in the kidneys stopped functioning.
3.6
Some systems in the human body are more important than others.
Is this statement TRUE or FALSE? Give a reason for your answer.
(1)
(2)
[9]
QUESTION 4
A student in a resting position measures her heartbeat three times with a stethoscope
and a stopwatch. The results are captured in a table as indicated below.
MEASUREMENT
1
2
3
NUMBER OF BEATS IN 20
SECONDS
21
21
24
4.1
Calculate the average heartbeat in 20 seconds.
(1)
4.2
Calculate the average heartbeat per minute.
(1)
4.3
What scientific reason can be provided for taking three measurements to
determine the average?
(2)
4.4
From the table, identify the independent variable.
(1)
4.5
The student then exercises for 30 minutes. What effect will the exercise
have on her pulse rate?
(1)
4.6
Which term is used to describe a person’s heartbeat when that person is
inactive or in rest?
QUESTION 5
The picture below illustrates the male reproductive organ.
(1)
[7]
Natural Sciences Grade 9
8
FS Revision Booklet Term 1 and 2
5.1
Provide labels for the parts numbered 2, 4 and 5.
5.2
Write only the number of the parts with the following functions:
5.3
(3)
5.2.1 Make sperm and the male sex hormone, testosterone.
(1)
5.2.2 Carries sperm from the testis to the penis.
(1)
List THREE changes that occur in the body of the male during puberty.
(3)
[8]
QUESTION 6
Study the diagram of a human body system and answer the questions that follow.
6.1
Which human system is represented by this diagram?
(1)
6.2
Name the type of digestion that takes place in part number 4.
(1)
6.3
Describe how part number 4 is adapted for digestion to take place.
(3)
6.4
Explain what happens to the nutrients, from the moment they enter
parts 3, 4 and 5 until they reach the body cells.
(2)
6.5
Define the term egestion.
(1)
[8]
Natural Sciences Grade 9
9
FS Revision Booklet Term 1 and 2
QUESTION 7
7.1
Study the information in the table and answer the questions that follow.
NAME OF SUBSTANCE
FORMULA
Carbon dioxide
CO2
Methane
CH4
Oxygen gas
O2
Water
H2O
Sodium
Na
STRUCTURE USED TO
REPRESENT
MOLECULES OF THE
VARIOUS SUBSTANCES
Use the information in the table and write BALANCED CHEMICAL EQUATIONS
for the reactions represented by the following structures:
7.1.1
7.1.2
7.2
+
+
+
(3)
(3)
Balance the following chemical equations:
7.2.1 Cu + O2 → CuO
(2)
7.2.2 Ca(OH)2 + H2SO4 → CaSO4 + H2O
(1)
Natural Sciences Grade 9
7.3.
10
FS Revision Booklet Term 1 and 2
Two UNKNOWN elements X and Y are represented by 168 X and 12
respectively.
24 Y
Use the Periodic Table and answer the following questions relating to X and Y.
Write down:
7.3.1 The NAME of the element represented by Y.
(1)
7.3.2 The CHEMICAL SYMBOL of the element represented by X.
(1)
7.3.3 Is X an example of a metal, non-metal or semi-metal?
(1)
7.3.4 The atomic number of Y.
(1)
[13]
QUESTION 8
8.1
Sulphur powder is heated with a bunsen burner until it starts to burn. The burning
sulphur is then lowered into a gas cylinder filled with pure oxygen gas.
A small volume of distilled water was placed in the bottom of the cylinder, before
the sulphur was lowered into the cylinder.
Oxygen gas (O2)
Sulphur (S)
Gas cylinder
Product dissolved in distilled
water
8.1.1 Write down all the observations that can be made during this
experiment.
(2)
8.1.2 Identify the gas that is liberated as a product during this combustion
reaction.
(1)
8.1.3 The gas in QUESTION 8.1.2 dissolves in the distilled water at the
bottom of the glass cylinder. What influence will this have on the distilled
water?
(1)
8.1.4 Write down the balanced chemical equation for the reaction which
takes place when sulphur burns in pure oxygen.
(2)
Natural Sciences Grade 9
8.2
11
FS Revision Booklet Term 1 and 2
An investigation was conducted to find out how iron (Fe) reacts with oxygen
gas (O2) during a combustion reaction.
Aim: To investigate the reaction of iron metal (Fe) with oxygen gas (O2).
Procedure: Iron wool was tied to a deflagrating spoon and heated with a Bunsen
burner until the iron started to glow. The glowing iron wool was then
transferred to a gas cylinder filled with pure oxygen gas.
A small volume of distilled water was placed in the bottom of the cylinder.
The cylinder was then shaken to allow the product which formed during
combustion to mix with the distilled water. Litmus paper was used to test the liquid.
Apparatus:
Deflagrating spoon
Oxygen gas
Iron (wool)
Iron(wool)
Bright orange glow and
sparks
Burner
Distilled
Water
8.2.1 What was the colour of the glowing iron wool in air, before it was
lowered into the flask containing pure oxygen?
(1)
8.2.2 What was the colour of the glowing iron wool inside the cylinder
after it was lowered into the flask containing pure oxygen?
(1)
8.2.3 Write down the NAME of the metal oxide which formed.
(1)
8.2.4 The reaction which took place in the cylinder, is known as a
combustion reaction.
What is the meaning of the term combustion?
(2)
8.3
Explain how rust forms.
(2)
8.4
Name TWO ways in which rust can be prevented.
(2)
[15]
Natural Sciences Grade 9
12
FS Revision Booklet Term 1 and 2
QUESTION 9
9.1
Hydrochloric acid is added to calcium carbonate in a reaction flask. Gas bubbles
are seen escaping while small clear liquid droplets are seen dripping from the
delivery tube.
Hydrochloric Acid
Delivery tube
Gas bubbles
Liquid droplets
CaCO3
9.1.1 Identify the salt which forms as a product during the reaction.
(1)
9.1.2 What are the liquid droplets which form at the end of the delivery
tube?
(1)
9.1.3 What gas is released during this reaction?
(1)
9.1.4 Write down a complete balanced chemical equation for the reaction
that takes place in the reaction flask.
(3)
9.2
Learners did an experiment to investigate the reaction between metals and acids.
After setting up the apparatus, they added hydrochloric acid into a test tube
containing iron powder. Gas bubbles were observed in the solution.
Natural Sciences Grade 9
13
FS Revision Booklet Term 1 and 2
9.2.1 What are the gas bubbles which are forming in the test tube?
(1)
9.2.2 Write down a WORD equation for the reaction that took place during
this experiment.
(2)
9.3
A general word equation for the reaction between an acid and a metal
hydroxide is:
Acid + metal hydroxide → salt + water
Write down a balanced chemical equation for the reaction between
sulphuric acid and magnesium hydroxide.
(3)
[12]
TOTAL SECTION B:
80
GRAND TOTAL:
100
_______________________________________________________________________
REVISION QUESTION PAPER B
SECTION A
QUESTION 1
1.1
Various options are provided as possible answers to the following questions.
Choose the answer and write only the letter (A – D) next to the question number
(1.1.1 – 1.1.10) in the ANSWER BOOK, e.g. 1.1.11 D.
1.1.1 The part of a plant cell, that is needed in order to produce glucose as well
as oxygen is the…
A
B
C
D
chloroplast.
mitochondrion.
cell wall.
vacuole.
1.1.2 The ovaries and uterus form part of the …
A
B
C
D
digestive system.
nervous system.
reproductive system.
respiratory system.
1.1.3 The hormone or hormones responsible for secondary sexual characteristics
in males and females are…
A
B
C
D
only oestrogen.
testosterone and oestrogen.
growth hormone and testosterone.
oestrogen as well as growth hormone
Natural Sciences Grade 9
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FS Revision Booklet Term 1 and 2
1.1.4 The correct order for the stages of reproduction is as follows:
A
B
C
D
Sexual intercourse  Ovulation  Fertilization  Pregnancy
Fertilization  Ovulation  Sexual intercourse  Pregnancy
Ovulation Fertilization  Sexual intercourse  Pregnancy
Ovulation  Sexual intercourse  Fertilization  Pregnancy
1.1.5 The following diagram represents …
A
B
C
D
gaseous exchange.
inhalation.
exhalation.
respiration.
1.1.6 The chemical symbol for carbon is …
A
B
C
D
K
C
Ca
Co
1.1.7 Why do beryllium and magnesium appear in the same group on the periodic
table?
A
B
C
D
They have the same chemical properties.
Both are non-metals.
Both are gases.
Their atomic numbers are the same.
1.1.8 Hydrogen nitrate (HNO3) consists of the following elements:
A
B
C
D
Helium, Nitrate and Oxygen
Hydrogen, Nitrate
Hydrogen, Nitrogen and Oxygen
Hydrogen, Oxygen and Ozone
1.1.9 Which one of the following is an example of a compound?
A
B
C
D
H2SO4
O2
2Fe
Na
Natural Sciences Grade 9
15
FS Revision Booklet Term 1 and 2
1.1.10 Which ONE of the following chemical equations does NOT represent a
balanced chemical equation?
A
B
C
D
1.2
SO2 + H2O → H2SO3
4Na + O2 → 2Na2O
Mg(OH)2 + 2HCl → MgCl2 + 2H2O
2Al + 3O2 → Al2O3
[10]
Give ONE word/term for each of the following descriptions. Write only the correct
word/term next to the question number.
1.2.1 The apparatus that is used to study very small objects like cells and microorganisms.
1.2.2 When a person does not receive enough oxygen to the brain, due to the
blockage of a blood vessel by a blood clot, it can lead to a ….
1.2.3 The common name given to both male and female reproductive cells.
1.2.4 The breakdown of the thick layer of blood in the uterus, which is released
through the vagina.
1.2.5 The type of digestion, which involves the breakdown of food with digestive
enzymes and hydrochloric acid.
1.2.6 A substance which changes colour when it comes into contact with an acid
or a base.
1.2.7 The solution used to test for the presence of carbon dioxide gas.
1.2.8 The smallest possible building block of a compound that has all the
properties of the compound.
1.2.9 The common name of the elements that are found in group 18 (VIII) on the
periodic table.
1.2.10 A pure substance consisting of identical atoms.
[10]
Natural Sciences Grade 9
1.3.
16
FS Revision Booklet Term 1 and 2
Choose the item in COLUMN B that best matches the description in COLUMN A.
Write down only the correct letter next to the question number.
Column A
Column B
1.3.1 An element in Group 1 that is a non-metal.
A Neutralization
1.3.2 The process that takes place when an acid reacts
B Sodium
with a base.
1.3.3 An element that occurs as a molecule.
C Hydrogen
1.3.4 The colour of bromothymol blue in an acidic
D Nitrification
solution.
E Blue
F Noble gas
G Yellow
H Carbon dioxide
I Red
(4)
[24]
SECTION B
QUESTION 2
2.1
Ronaldo received the following diagram of a plant cell. Help him to identify the cell
as a plant cell, by studying the diagram and answering the questions that follow.
2.1.1 Use the diagram and identify the parts labelled 2, 5, and 6.
(3)
Natural Sciences Grade 9
17
FS Revision Booklet Term 1 and 2
2.1.2 Ronaldo used organelles 1 and 7 on the diagram to identify the cell as a
plant cell.
Redraw the table below in your ANSWER BOOK and make use of organelle 1
and 7 to TABULATE TWO differences between a plant and an animal cell.
Also write down the names of organelle 1 and 7 in the spaces provided in the
table.
Name of
organelle
Plant Cell
Animal Cell
Organelle 1
Organelle 7
(6)
2.1.3 Organelle 4 is responsible for cellular respiration.
2.1.3.1
Name organelle 4.
(1)
2.1.3.2
Explain why there are so many of organelle 4 present
in a cell.
(1)
2.1.3.3
2.2
Organelle 4 produces a toxic by-product. Name this by-product
and explain how the body gets rid of it.
(2)
[13]
Study the following diagram of the male sex organ, and answer the questions that
follow:
2.2.1 Name parts C, D and E.
(3)
2.2.2 Give the LETTER and the NAME of the part, where sperm is
produced.
(2)
2.2.3 Each of the above parts receives blood through an artery. Name
the gas that is transported by the blood in the arteries.
(1)
2.2.4 Veins are used to take the blood back to the heart. Name the gas that is
transported by the blood in the veins.
(1)
Natural Sciences Grade 9
18
FS Revision Booklet Term 1 and 2
2.2.5 Name the process and explain in full sentences how the gases
named in 2.2.3 and 2.2.4 travel in and out of the cells.
2.3.
(3)
[10]
Use the following diagram to answer the questions that follow:
2.3.1 The digestive system makes use of both chemical and mechanical
digestion. Explain the term mechanical digestion.
(1)
2.3.2 Make use of the diagram above and give the NUMBERS, as well as
NAMES of THREE places in the digestion system where mechanical
digestion takes place.
(3)
2.3.3 Give the name of the part where faeces is stored before it leaves the
body through the anus.
(1)
2.4
Janine decided to lose some weight for the upcoming school concert. She got the
following diet (eating plan) from the internet and decided to follow it strictly on a
daily basis.
•
•
•
•
•
Breakfast: 1 Hardboiled egg
Snack: 1 Apple and 30 g nuts
Lunch: Steamed fish with a green salad
Snack: 1 Cup chopped cucumber
Dinner: 250 ml Yoghurt with 50 grams of fruit
2.4.1 Would you say that this is a balanced eating plan? Motivate your
answer.
(2)
[7]
Natural Sciences Grade 9
19
FS Revision Booklet Term 1 and 2
QUESTION 3
3.1
Sexually transmitted diseases like HIV cause many health problems, which lead to
many people in our country becoming ill and therefore not able to work. This fact is
very negative for our country's economy.
The following table shows the number of people suffering from HIV as a
percentage (%) of the total number of people living in each of the nine provinces of
South Africa.
Province
KZN
MP
FS
EC
NW
GP
LP
NC
WC
Percentage (%) of people
suffering from HIV
27.6
26
19.6
18.7
18.6
18.5
14
10
9.2
3.1.1 Use the information in the table and draw a bar graph showing the
percentage (%) of people suffering from HIV in each of the nine provinces.
Provide the graph with a title and labels for both the x-and y-axes.
(5)
3.1.2 Identify the dependent variable in this investigation.
(1)
3.1.3 Why is it such a big problem that people between the ages of 30 and 49
are suffering from diseases such as HIV?
(1)
3.1.4 There are two systems in the human body involved in the transmission
of HIV from one person to another. Name these two systems.
(2)
3.1.5 What can be used during sexual intercourse to prevent the transmission
of HIV.
(1)
[10]
Natural Sciences Grade 9
20
FS Revision Booklet Term 1 and 2
QUESTION 4
The following experiment is carried out to demonstrate the combustion of two elements,
namely magnesium and carbon in oxygen gas.
A small piece of each of the mentioned elements are placed in two separate deflagrating
spoons and heated over open flames. The heated elements are then lowered into two
separate gas cylinders (A and B), filled with oxygen gas.
Observations:
The element which was placed in gas cylinder A burned with a blinding white flame.
The product which formed during this reaction was dissolved in distilled water at the
bottom of the cylinder. A piece of pink litmus paper turned blue after it was placed in this
solution.
The element placed in gas cylinder B glowed with a bright orange colour and liberated
a colourless gas.
4.1.
What is meant with the term "combustion" in the experiment above?
4.2
Answer the following questions considering the observations and results
from the above experiment.
4.3
(1)
4.2.1 Write down the SYMBOL of the element used in gas cylinder A.
(1)
4.2.2 Write down the NAME of the element used in gas cylinder B.
(1)
4.2.3 Write down the NAME of the PRODUCT which formed in
gas cylinder A.
(1)
Complete and balance the following chemical equation:
Mg + O2 → …
(2)
[6]
Natural Sciences Grade 9
21
FS Revision Booklet Term 1 and 2
QUESTION 5
When a shifting spanner, consisting mainly of iron is left outside in the rain, a thin layer of
a reddish-brown powder starts to form on its surface within a few weeks.
5.3
5.1.
What is the common name for the reddish-brown layer of powder
that forms on the surface of the shifting spanner?
(1)
5.2
What is this process called when iron reacts with oxygen in the
presence of moisture?
(1)
The chemical reaction that takes place during the formation of the
reddish-brown layer can be represented as follows:
Iron + Oxygen gas → Iron oxide
Use chemical formulae and write down a BALANCED chemical equation
for the above-mentioned reaction.
(4)
[6]
QUESTION 6
Sulfur occurs as a yellow powder that can be used in the control
of certain fungal diseases on plants. When sulfur burns in oxygen,
it forms a colourless gas namely sulphur dioxide. This gas has a
suffocating smell and forms an acid when it dissolves in water.
6.1
Write down the chemical symbol for sulphur.
6.2
Complete the sentence:
6.3
6.4
(1)
Non-metal oxides are also referred to as … oxides.
(1)
Write down the FORMULA for the compound that will form when
sulfur burns in oxygen.
(1)
The acid that forms when sulfur dioxide gas dissolves in moisture which
is found in the atmosphere is very harmful to our environment. Describe
TWO of these negative, harmful effects.
(2)
[5]
Natural Sciences Grade 9
22
FS Revision Booklet Term 1 and 2
QUESTION 7
An experiment was carried out with the purpose to investigate how fast (rate)
iron reacts with hydrochloric acid solutions with different pH values.
Seven similar iron bars, each weighing 100g were placed into separate test tubes
containing hydrochloric acid solutions with different pH values. It is important to note that
the solutions used were the same in every aspect, with the exception of their pH values
that were not the same.
The mass of iron that reacted with the different hydrochloric acid solutions were
determined by weighing the iron bars after they were allowed to react with the solutions
for 10 minutes.
The mass of iron (in gram) that reacted with the different hydrochloric acid solutions in a
time of 10 minutes, are given in the table below:
Test tube
pH-value of the
solution
Mass (g) of iron that
reacted
A
1
B
2
C
3
D
4
E
5
F
6
G
7
60
55
50
45
15
10
5
7.1
Write down a possible hypothesis for this experiment.
(2)
7.2
Identify the dependent variable in this experiment.
(1)
7.3
Identify the independent variable in this experiment.
(1)
7.4
What is the pH value of the solution with the highest acidity in the table
above?
(1)
7.5
In which test tube (A-G) will a neutral solution be found?
(1)
7.6
Write down the CHEMICAL SYMBOL of the metal that was used during
this experiment.
(1)
Write down the general word equation for the reaction between
an acid and a metal.
(2)
7.7
7.8.
Name two properties of acids.
(2)
[11]
Natural Sciences Grade 9
23
FS Revision Booklet Term 1 and 2
QUESTION 8
8.1
Sindi's father regularly experiences heartburn when stomach acid (hydrochloric
acid) pushes up into his oesophagus. Her father then drinks a glass of water with
an antacid dissolved in the water. The antacid contains sodium carbonate.
8.1.1 A salt and two more products form when an acid reacts with
a metal carbonate Write down the NAMES of these TWO products
that will form together with the salt.
(2)
8.1.2 A gas is released while the above reaction is taking place.
Write down the FORMULA of this gas and explain how you can test for
this gas in the laboratory.
(2)
8.1.3 Complete and balance the following reaction:
HCl + Na2CO3 → … + … + …
(4)
[8]
SECTION B:
GRAND TOTAL:
76
100
_______________________________________________________________________
REVISION QUESTION PAPER C
SECTION A
QUESTION 1
1.1
Four options are provided as possible answers to the following questions. Each
question has only ONE correct answer. Write only the letter next to the question
number in the ANSWER BOOK e.g., 1.1.6 D.
1.1.1 Plant cells have a fixed shape because they have …
A
B
C
D
a cellulose cell wall.
a cell membrane.
large vacuoles.
many chloroplasts.
(1)
1.1.2 Which of the following forms part of the musculoskeletal system?
A
B
C
D
Cartilage
Kidneys
Small intestine
Brain
(1)
Natural Sciences Grade 9
24
FS Revision Booklet Term 1 and 2
1.1.3 Blood enters the kidney through P and leaves the kidney through Q. Urine leaves
the kidney via:
A
B
C
D
T
V
Q
R
(1)
1.1.4 What is the main function of the heart?
A
B
C
D
Physical manipulation of solid food.
Regulation of digested food.
Filtering minerals from blood.
To pump blood.
(1)
1.1.5 The sequence in which food moves along the alimentary canal is...
A
B
C
D
oesophagus, stomach, large intestine, small intestine.
oesophagus, small intestine, large intestine, stomach.
oesophagus, stomach, small intestine, large intestine.
oesophagus, small intestine, stomach, large intestine.
(1)
1.1.6 What do the following elements have in common?
I, F, Cℓ, Br
A
B
C
D
They have the same number of protons.
They have the same number of protons in the nucleus.
They have the same number of electron shells.
They are found in the same group on the periodic table.
(1)
Natural Sciences Grade 9
25
FS Revision Booklet Term 1 and 2
1.1.7 A compound in which carbon, hydrogen and oxygen are bonded in the
ratio 1 : 2 : 2 is:
A
B
C
D
H2CO3
C2H4O2
CH2O2
C4H2O
(1)
1.1.8 New substances that are formed during chemical reactions are called ...
A
B
C
D
atoms.
products.
sub-atomic particles.
reactants.
1.1.9 Study the following equations and indicate the correct balanced equation.
A
B
C
D
2Na + H2O → 2NaOH + H2O
2Na + 2H2O → 2NaOH + H2
Na + 2H2O → 2NaOH + H2
2Na + H2O → 2NaOH + 2H2
(1)
1.1.10 Arrange according to the pH scale from the least to the most acidic.
A
B
C
D
6: 4: 2: 1
1: 4: 2: 6
6: 2: 1: 4
1: 2: 4: 6
(1)
[10]
1.2 Give ONE word/term for each of the following descriptions. Only write
down the correct word/term next to the question number (1.2.1 – 1.2.5)
in your ANSWER BOOK.
1.2.1
A group of cells with the same structure, performing the same
function.
(1)
1.2.2
A tough inelastic tissue which attaches muscles to bones.
(1)
1.2.3
The stage in the human lifecycle when sexual organs mature for
reproduction.
(1)
A device or apparatus which can be used to prevent unwanted
pregnancy and sexually transmitted diseases like AIDS.
(1)
1.2.4
1.2.5
The breaking down of food into dissolved nutrients that can be
absorbed into the bloodstream.
(1)
[5]
Natural Sciences Grade 9
1.3
26
FS Revision Booklet Term 1 and 2
Choose the item from Column B that matches the description in Column A.
Write down the number from Column A with the corresponding LETTER of
your choice from Column B, for e.g., 1.3.6 K.
Column A
1.3.1
1.3.2
1.3.3
Column B
The measure of how acidic or basic a substance
is.
Process taking place when vinegar is mixed with
bicarbonate of soda.
A substance that changes colour in an acid and a
base.
A
sulphuric acid
B
pH
C
carbon dioxide
1.3.4
H2SO4
D
hydrochloric acid
1.3.5
Acid + metal carbonate → salt + … + water
E
acidity
F
indicator
G
oxygen
H
neutralisation
[5]
TOTAL SECTION A: 20
SECTION B
QUESTION 2
Study the following diagram of a cell and answer the questions that follow:
Natural Sciences Grade 9
27
FS Revision Booklet Term 1 and 2
2.1
Provide a suitable heading for the diagram.
(1)
2.2
Give TWO visible reasons for your answer in 2.1.
(2)
2.3
What is the function of the part labelled C?
(1)
2.4
Identify the parts labelled B and D.
(2)
2.5
Why is the cell in the diagram above unable to make its own food?
(1)
2.6
Explain why there are so many of organelle A present in the cell.
(2)
[9]
QUESTION 3
The diagram shows part of the respiratory system. Study the diagram and answer the
questions that follow.
3.1
Identify the structures labelled X and Y.
(2)
3.2
How is Y adapted to perform gaseous exchange?
(1)
3.3
The respiratory system is working closely with the system that is composed
of the heart, arteries, capillaries and veins. What is the name of this
system?
(1)
3.4
Name TWO processes associated with the system mentioned in your
answer to question 3.3.
(2)
Asthma is when the bronchioles become chronically inflamed. People
find it difficult to breathe. Name TWO other illnesses associated with the
respiratory system.
(2)
3.5
Natural Sciences Grade 9
3.6
28
FS Revision Booklet Term 1 and 2
Consider the following statement:
Some systems in the human body are more important than others.
Is this statement TRUE or FALSE? Give a reason for your answer.
(2)
[10]
QUESTION 4
A group of Grade 9 learners investigated the effect different types of exercise have
on the heart rate. They measured the heart rate of 5 learners after each of the
following activities:
•
•
•
•
Rest
After brisk walking for five minutes
After jogging for two minutes
After jumping with a skip rope for 2 minutes.
They recorded their results in the table shown below.
Learner 1
Learner 2
Learner 3
Learner 4
Learner 5
AVERAGE
Heart rate (beats per minute) after each activity
Brisk
Rest
Jogging
Jumping
walking
66
72
80
98
72
72
86
100
72
74
82
108
68
74
84
96
78
86
100
120
71,2
75,6
86,4
X
4.1
Identify the dependant variable.
(1)
4.2
Calculate the value of X in the table (average heart rate for jumping).
(2)
4.3
Use the information in the table and draw a bar graph to show the
average heart rate for the different types of exercise.
Use the graph paper provided on the ANSWER SHEET at the back of the
question paper.
(6)
4.4
Suggest a reason why a person’s heart rate changes during exercise.
(1)
[10]
Natural Sciences Grade 9
29
FS Revision Booklet Term 1 and 2
QUESTION 5
Study the diagram of the male sex organ, and answer the questions that follow:
5.1
Provide labels for the parts numbered B, D and E.
5.2
Write only the LETTER of the parts with the following functions:
5.3
(3)
5.2.1 Make sperm and the male sex hormone, testosterone.
(1)
5.2.2 Carries sperm from the testis to the penis.
(1)
Explain the term fertilisation.
(1)
[6]
QUESTION 6
The diagram below shows parts of the alimentary canal. Study the diagram and
answer the questions that follow.
6.1
Provide the correct labels for the parts numbered B, C and E.
(3)
6.2
What is meant by egestion?
(1)
Natural Sciences Grade 9
6.3
30
FS Revision Booklet Term 1 and 2
Explain what happens to the nutrients, from the moment they enter
parts C, D and E until they reach the body cells.
(2)
[6]
QUESTION 7
Study the symbol of the following element and use the periodic table provided to answer
the questions.
7.1
Name the element represented by the symbol above.
(1)
7.2
Give the element’s atomic number.
(1)
7.3
Is the element a metal, a non-metal or a semi-metal?
(1)
7.4
In which group of the periodic table does this element appear?
(1)
7.5
Write down the NAME of the compound formed when this element
reacts with sulphur.
(1)
7.6
Write down a balanced equation for the reaction in question 7.5.
(2)
[7]
QUESTION 8
8.1
An investigation is conducted to find out how iron (Fe) reacts with oxygen
gas (O2) during a combustion reaction.
Procedure:
Iron wool is tied to a deflagrating spoon and heated over a flame until it starts to
glow. The glowing iron wool is then lowered into a gas cylinder filled with pure
oxygen gas.
Natural Sciences Grade 9
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FS Revision Booklet Term 1 and 2
Apparatus:
8.1.1
The iron wool glows with an orange colour when it is heated in the
air. But when the iron wool is lowered into the gas cylinder
filled with pure oxygen, it glows with a bright yellow colour and
throws off a shower of sparks. Briefly explain this observation.
(1)
8.1.2
Write down the NAME of the metal oxide which forms.
(1)
8.1.3
Write down the FORMULA of the metal oxide that forms.
(1)
8.1.4
The reaction that takes place in the diagram above is known as a
combustion reaction. Explain the term combustion.
(2)
When iron is exposed to air, rusting can take place at the surface
of the iron. Which TWO chemical substances are essential for
rusting of iron to take place?
(2)
Name TWO ways in which rust can be prevented.
(2)
8.1.5
8.1.6
8.2
Carbon powder is heated with a Bunsen burner until it starts to burn. The carbon is
then lowered into a gas cylinder filled with pure oxygen gas.
A small amount of water is present in the bottom of the cylinder.
Natural Sciences Grade 9
32
FS Revision Booklet Term 1 and 2
8.2.1 List TWO observations that can be made while the carbon is burning
in the oxygen.
(2)
8.2.2 Give the NAME of the gas that is liberated as a product during this
combustion reaction.
(1)
8.2.3 The gas named in question in 8.2.2 dissolves in the distilled water at the
bottom of the cylinder. Describe how this will affect the pH of
the distilled water.
(1)
8.2.4 Give the balanced chemical equation for the reaction of carbon
burning in oxygen.
(2)
[15]
QUESTION 9
9.1
Pieces of magnesium ribbon are added to hydrochloric acid (HCℓ) in a test tube.
The contents of the flask react as shown below.
9.1.1 What will be OBSERVED in test tube A when the pieces of magnesium
ribbon react with the hydrochloric acid?
(1)
9.1.2 When a burning match is used to ignite the gas assembled in test tube B, a
popping sound is heard. Write down the NAME of the gas. (1)
9.1.3 Complete and balance the equation for this reaction:
Mg + HCℓ → MgCℓ2 + ...
(2)
Natural Sciences Grade 9
9.2
33
FS Revision Booklet Term 1 and 2
Josh and Pule investigated how the length of the magnesium ribbon would affect
the amount of hydrogen gas produced. They thought that a longer piece
of magnesium ribbon would release more hydrogen gas. They carried out an
experiment to test it.
9.2.1 Write down Josh and Pule's hypothesis for the investigation.
9.2.2 Indicate the:
(a) independent variable.
(b) dependent variable.
(2)
(1)
(1)
[8]
QUESTION 10
Hydrochloric acid is added to calcium carbonate in a reaction flask. Gas bubbles are
observed while clear liquid droplets drip from the delivery tube.
10.1
Give the NAME of the salt which forms during the reaction.
(1)
10.2
Give the chemical FORMULA of the liquid droplets.
(1)
10.3
Which gas is released during this reaction?
(1)
10.4
Write down a complete balanced chemical equation for the reaction
which takes place in the reaction flask.
(4)
10.5
How will you test for the gas that forms in the reaction above?
TOTAL SECTION B:
GRAND TOTAL:
(2)
[9]
80
100
Natural Sciences Grade 9
34
FS Revision Booklet Term 1 and 2
ANSWER SHEET FOR QUESTION 4.3
NAME: _______________________________________
GRADE: __________
Natural Sciences Grade 9
35
FS Revision Booklet Term 1 and 2
MEMORANDUM: REVISION QUESTION PAPER A
SECTION A
QUESTION 1.1
1.1.1 C✓
1.1.2 A✓
1.1.3 A✓
1.1.4 C✓
1.1.5 B✓
1.1.6 C✓
1.1.7 B✓
1.1.8 C✓
1.1.9 A✓
1.1.10 A✓
[10]
QUESTION 1.2
1.2.1 organelles✓
1.2.2 tendon✓
1.2.3 ovulation✓
1.2.4 breathing✓
1.2.5 constipation✓
[5]
QUESTION 1.3
1.3.1 D ✓
1.3.2 F ✓
1.3.3 E ✓
1.3.4 G ✓
1.3.5 B ✓
[5]
TOTAL SECTION A:
20
SECTION B
QUESTION 2
2.1
Animal cell ✓
• Have an irregular shape✓
• Only has a cell membrane✓
• Small vacuoles✓
• No chloroplasts present✓
(Give 2 marks for only 2 visible reasons) (3)
2.2
Nucleus✓
• Contains DNA (hereditary material) of the cell.✓
• Controls cell activity.✓
(Give 1 mark for only ONE function)
(2)
2.3.1 7✓
(1)
2.3.2 Mitochondria✓
(1)
Natural Sciences Grade 9
2.4
36
FS Revision Booklet Term 1 and 2
In animal cells they are the main power generators, converting oxygen
and nutrients into energy.
OR
Animals need mitochondria to produce energy for their life
processes.✓
(1)
[8]
QUESTION 3
3.1
The circulatory system.✓
(1)
3.2
Circulation of blood between the heart and the lungs.✓
Circulation of blood between the heart and the rest of the body.✓
(2)
3.3
Nervous system OR 6✓
(1)
3.4
Bones✓ and muscles✓
(2)
3.5
•
•
•
•
3.6
Waste products and a part of the water will not be separated from the blood. ✓
Blood, which leaves the kidneys, will not be purified. ✓
The body fills with extra water and waste products. ✓
Waste products are not removed from the blood and a person will
become extremely ill. ✓
(Any one)
(1)
False✓
Our bodies are made up of many systems that work together in
order for us to perform our daily activities. ✓
OR
The body systems are interdependent, and one system cannot function
without the others. ✓
(2)
[9]
QUESTION 4
4.1
4.2
4.3
4.4
4.5
4.6
(21 +21+24) ÷3 = 22✓
22 x 3 = 66 heartbeats per minute✓
The accuracy✓ and validity✓ of the measurement.
Measurement.✓
The heart rate will increase.✓
Resting heartbeat✓
(1)
(1)
(2)
(1)
(1)
(1)
[7]
QUESTION 5
5.1
2 – scrotum✓
4 – penis ✓
5 – urethra✓
5.2.1 3✓
(3)
(1)
Natural Sciences Grade 9
37
FS Revision Booklet Term 1 and 2
5.2.2 1✓ Marks for numbers only
(1)
5.3
•
•
•
•
•
Testicle and penis size increases.✓
Hair starts to grow on the pubic areas, the limbs, chest and the face.✓
Voice becomes deeper as the larynx (voice box in your throat) grows.✓
Body shape changes occur as the skeletal muscle and bones increase
in size and shape.✓
Body odour and acne start to develop, as with females.✓
(Any THREE changes)
(3)
[8]
QUESTION 6
6.1
6.2
6.3
The digestive system✓
Chemical digestion ✓
•
•
•
•
6.4
6.5
(1)
(1)
Since most of the digestion and absorption process takes place in
the small intestines, it is especially long and folded to create an
even bigger absorption area. ✓
The inner layer of the small intestine is lined with small finger like structures
called villi which aid absorption and increases the area
for absorption. ✓
The small intestine has a large network of capillaries surrounding it
to transport the absorbed food away to the other parts of the body. ✓
The muscles of the small intestine control the direction in which the
food flows through peristalsis. ✓
(Any THREE adaptations) (3)
The bigger nutrient molecules are broken down to a size small enough to
enter the bloodstream or the be absorbed by the bloodstream.✓
The bloodstream carries the nutrients to all the body cells.✓
Egestion is the passing out of solid undigested waste from the digestive
tract via the anus.✓
(2)
(1)
[8]
QUESTION 7
7.1.1 CH4 + 2O2 → CO2 + 2H2O
7.1.2 4Na + O2 → 2Na2O
(✓reactants ✓products ✓balancing)
(✓reactants ✓products ✓balancing)
7.2.1 2Cu + O2 → 2CuO
7.2.2 Ca(OH)2 + H2SO4 → CaSO4 + 2H2O
7.3.1
7.3.2
7.3.3
7.3.4
Magnesium✓
O✓
non-metal
12✓
(✓2Cu and ✓2CuO)
(✓2H2O)
(3)
(3)
(2)
(1)
(1)
(1)
(1)
(1)
[13]
Natural Sciences Grade 9
38
FS Revision Booklet Term 1 and 2
QUESTION 8
8.1.1 Sulphur burns with a blue/purple flame✓ and suffocating gas/white
fumes✓ are liberated.
(2)
8.1.2 SO2 (sulphur dioxide)
(1)
8.1.3 The water will become acidic.✓ OR The solution will be acidic /
have a pH below 7.
(1)
8.1.4 S + O2 → SO2
(2)
8.2.1
8.2.2
8.2.3
8.2.4
8.3
8.4
(✓reactants ✓ product)
Red / Orange / Yellow glow✓
Bright orange glow OR Yellow/orange sparks✓
Iron oxide✓
Combustion refers to the reaction of a substance✓(metal or non-metal)
with oxygen.✓
Rusting is a slow chemical reaction of iron metal, with oxygen and
moisture (water) ✓ to form a complex compound part of which is iron
oxide. ✓
Iron and steel can be painted to keep away moisture and oxygen. ✓
Iron and steel can be coated with a thin layer of chromium or zinc
(metals with no rust). ✓ This is done by an electroplating technique which
is a form of electrolysis.
(1)
(1)
(1)
(2)
(2)
(2)
[15]
QUESTION 9
9.1.1 Calcium chloride (CaCl2)✓
9.1.2 Water (H2O)✓
9.1.3 Carbon dioxide (CO2)✓
(1)
(1)
(1)
9.1.4 CaCO3 + 2HCl → CaCl2 + CO2 + H2O (✓reactants✓ products✓balancing) (3)
9.2.1 H2-gas OR Hydrogen gas✓
9.2.2 Iron + Hydrochloric acid → Iron chloride + Hydrogen gas
(✓ reactants ✓products)
9.3
H2SO4 + Mg(OH)2 → MgSO4 +2H2O (✓reactants✓products✓balancing)
TOTAL SECTION B:
GRAND TOTAL:
(1)
(2)
(3)
[12]
80
100
_______________________________________________________________________
Natural Sciences Grade 9
39
FS Revision Booklet Term 1 and 2
MEMORANDUM: REVISION QUESTION PAPER B
SECTION A
QUESTION 1
1.1.1. A 
1.1.2. C 
1.1.3. B 
1.1.4. D 
1.1.5. C 
1.1.6. B 
1.1.7. A 
1.1.8. C 
1.1.9. A 
1.1.10 D 
(10)
1.2.1. Microscope 
1.2.2. Stroke 
1.2.3. Gamete(s) 
1.2.4. Menstruation 
1.2.5. Chemical digestion 
1.2.6. Indicator 
1.2.7. Clear lime water 
1.2.8. Molecule
1.2.9. Noble gases 
1.2.10 Element 
(10)
1.3.1 C 
1.3.2 A 
1.3.3 C 
1.3.4 G 
(4)
[24]
SECTION B
QUESTION 2
2.1.1 2 – Cell wall
5 – Nucleus
6 – Cytoplasm
2.1.2
Name of organelle
(3)
Plant cell
Animal cell
1 - Vacuole 
One big vacuole 
None OR many small
vacuoles. 
7 - Chloroplast 
Present in plant cell 
No Chloroplast. 
(6)
2.1.3.1 4 – Mitochondrion/Mitochondria 
(1)
Natural Sciences Grade 9
40
FS Revision Booklet Term 1 and 2
2.1.3.2 Many mitochondria are needed for sufficient energy production. 
OR for sufficient or effective respiration
2.1.3.3 Carbon dioxide  It is exhaled. 
(1)
(2)
[13]
2.2.1 C - Urethra 
D - Sperm duct / Vas deferens 
E - Penis 
(3)
2.2.2 G.  Testes 
(2)
2.2.3 Oxygen 
(1)
2.2.4 Carbon dioxide 
(1)
2.2.5 Gaseous exchange:  Oxygen moves through the cell membrane from the
capillary into the cell  through diffusion. Carbon dioxide moves
through the cell membrane to the capillary by means of diffusion.
(3)
[10]
2.3.1 Mechanical digestion involves the physical break down of food particles  (1)
2.3.2 1 - Mouth 
3 - Stomach 
4 – Small intestines 
Number AND name must be correct✓
(3)
2.3.3 Rectum
(1)
2.4.1 No.  A balanced diet also includes carbohydrates / diet does not include
carbohydrates. 
(2)
[7]
QUESTION 3
(%) People suffering from HIV
3.1.1
(%) People suffering from HIV in the various provinces of
South Africa 
 Accuracy
Province 
(5)
Natural Sciences Grade 9
41
FS Revision Booklet Term 1 and 2
3.1.2 % of People suffering from HIV
(1)
3.1.3 People become ill and are therefore not able to work and earn money
to take care of families.
(OR any other relevant / correct answer) 
(1)
3.1.4 Circulatory system
Reproductive system 
(2)
3.1.5 Condoms
(1)
[10]
QUESTION 4
4.1.
Reaction with oxygen. 
(1)
4.2.1. Mg 
(1)
4.2.2. Carbon
(1)
4.2.3. Magnesium oxide 
(1)
4.3.
2Mg + O2 → 2MgO  balance 
(2)
[6]
QUESTION 5
5.1.
5.2.
5.3.
Rust 
Rusting/Corrosion/Oxidation (any one) 
4Fe  + 3O2 → 2Fe2O3  balance 
(1)
(1)
(4)
[6]
QUESTION 6
S
(1)
acidic  oxides
(1)
SO2 
(1)
Acid rain is produced which damages statues/buildings made from sandstone.
Acid rain also causes iron and steel structures to corrode.
Cultivation of crops are negatively affected.
Acid rains acidifies soil, lakes and rivers which kills plants/animals.
(Any two)
(2)
[5]
QUESTION 7
6.1.
6.2.
6.3.
6.4.
7.1.
7.2.
7.3.
7.4.
7.5.
7.6.
7.7.
Iron reacts faster with a decrease in the pH of the solution.
OR Iron reacts slower with an increase in the pH of the solution 
(2)
The mass of iron that reacted. 
pH-value 
1
G
Fe 
Acid + Metal  → Salt/metal salt + hydrogen gas 
(1)
(1)
(1)
(1)
(1)
(2)
Natural Sciences Grade 9
7.8.
42
FS Revision Booklet Term 1 and 2
Taste sour / pH < 7 / Corrosive / Bromothymol blue turns yellow in acid /
Universal indicator turns red.
(Any TWO applicable properties) 
(2)
[11]
VRAAG 8
8.1.1. Carbon dioxide  Water 
8.1.2. CO2  Test for CO2: Clear lime water turns milky
8.1.3. 2HCl + Na2CO3 → 2NaCl  + H2O + CO2  (balance )
(2)
(2)
(4)
[8]
SECTION B:
76
GRAND TOTAL: 100
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MEMORANDUM: REVISION QUESTION PAPER C
SECTION A
QUESTION 1.1
1.1.1 A✓
1.1.2 A✓
1.1.3 D✓
1.1.4 D✓
1.1.5 C✓
1.1.6 D✓
1.1.7 C✓
1.1.8 B✓
1.1.9 B✓
1.1.10 A✓
[10]
QUESTION 1.2
1.2.1 tissue✓
1.2.2 tendon✓
1.2.3 puberty✓
1.2.4 condom✓
1.2.5 digestion✓
[5]
QUESTION 1.3
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
B✓
H✓
F✓
A✓
C✓
[5]
TOTAL SECTION A: 20
Natural Sciences Grade 9
43
FS Revision Booklet Term 1 and 2
SECTION B
QUESTION 2
2.1
Animal cell ✓
(1)
2.2
Have an irregular shape. / Does not have a fixed shape.✓
Only has a cell membrane. / No cell wall is present. ✓
Small vacuoles.✓
No chloroplasts present.✓ Give 2 marks for first 2 visible reasons.
(2)
Many chemical reactions take place within the cytoplasm. ✓
OR
Many cellular activities take place within the cytoplasm. ✓
(1)
B - cell membrane✓
D - nucleus (accept nucleoplasm) ✓
(2)
2.5
Animal cells do not contain chloroplasts for photosynthesis. ✓
(1)
2.6
In animal cells, organelle A / mitochondria are the main power generators,
converting oxygen and nutrients into energy.✓
There must be many mitochondria to ensure that enough energy is
produced for all the life processes.✓
(2)
[9]
2.3
2.4
QUESTION 3
3.1
X- trachea✓
Y - alveolus✓ (accept alveoli)
(2)
3.2
Alveoli are folded to increase their surface area, so more air is diffused. ✓
OR
Walls of the alveoli are moist so gases can dissolve easily. ✓
OR
Alveoli have very thin walls (one cell thick) for diffusion to easily take place. ✓
OR
Alveoli are surrounded by a network of capillaries so diffusion takes place
easily. ✓
(1)
3.3
Circulatory system✓
(1)
3.4
Circulation of blood between the heart and the lungs. ✓
Circulation of blood between the heart and the rest of the body. ✓
(2)
3.5
Lung cancer / Bronchitis / Asbestosis / Emphysema✓
(ANY TWO) (2)
Natural Sciences Grade 9
44
FS Revision Booklet Term 1 and 2
3.6
False✓
The body systems are interdependent, and one system cannot function without the
others. ✓
OR
Our bodies are made up of many systems that work together for us to perform our
daily activities. ✓
(2)
[10]
QUESTION 4
4.1
Heart rate✓
(1)
4.2
X = Total of readings for jumping ÷ 5
= 522 ÷ 5 ✓ (instead of 522, accept 98 + 100 + 108 + 96 + 120)
=104,4 ✓
(2)
4.3
Heart rate (beats per minute)
Graph of heart rate versus types of
exercise
110
100
90
80
70
60
50
40
30
20
10
0
104.4
86.4
71.2
75.6
(6)
Rest
Brisk
walking
Jogging
Types of exercise
Jumping
Criteria
Heading/Title
Must contain both
variables
Label of x-axis
Label of y-axis
Label and measuring
unit
Plotting of data:
1 or 2 bars correct ✓
3 bars correct ✓✓
4 bars correct ✓✓✓
Apply positive
marking from q 4.2
for value of 4th bar.
4.4
The heart must beat faster during exercise, increasing the heartrate to deliver
the necessary blood flow to the muscles. ✓
OR
The body muscles increase their activity and consume/need more blood.✓ (1)
[10]
QUESTION 5
5.1
B - scrotum✓
D - penis ✓
E - urethra✓
5.2.1 C✓
5.2.2 A✓
5.3
Accept LETTERS only
Fertilization is the fusion of the sperm and egg, producing a zygote.✓
(3)
(1)
(1)
(1)
[6]
Marks
1
1
1
3
Natural Sciences Grade 9
45
FS Revision Booklet Term 1 and 2
QUESTION 6
6.1
6.2
B - oesophagus✓
C - stomach✓
E - large intestine✓ (Accept colon)
(3)
Undigested or unwanted particles that travel through the digestive track
which are passed out as faeces.✓
OR
Undigested food and waste products get passed out of the body. ✓
OR
The discharge or expulsion of undigested material (food) from the
digestive tract (via the anus). ✓
(1)
6.3
The bigger nutrient molecules are broken down to a size small enough to
enter the bloodstream or to be absorbed by the bloodstream.✓
The bloodstream then carries the nutrients to all the body cells.✓
(2)
[6]
QUESTION 7
7.1
7.2
7.3
7.4
7.5
7.6
Oxygen✓
8✓
Non-metal✓
6 OR 16✓
Sulphur dioxide✓
S + O2 → SO2
✓Reactants ✓Products
(1)
(1)
(1)
(1)
(1)
(2)
[7]
QUESTION 8
8.1.1 In pure oxygen, the combustion/chemical reaction takes place much
faster,✓therefor the iron wool glows with a brighter colour and sparks are caused.
OR
The reaction in pure oxygen is more vigorous.✓
OR
The oxygen concentration in the air is lower and the rate of the reaction is
lower.✓
(1)
8.1.2 Iron oxide✓
(1)
8.1.3 Fe2O3✓
(1)
8.1.4 Combustion is the reaction of a substance✓ (metal or non–metal) with
oxygen.✓
(2)
8.1.5 Water / H2O✓ and Oxygen / O2✓
(2)
8.1.6 Iron and steel can be painted / coated with oil✓ to keep away moisture and
oxygen.
Iron and steel can be coated (through electroplating) with a thin layer of
chromium or zinc or metals which do not rust.✓
(2)
Natural Sciences Grade 9
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FS Revision Booklet Term 1 and 2
8.2.1 Carbon burns with a bright orange / yellow flame.✓
A suffocation gas / white fumes are formed. ✓
8.2.2 Carbon dioxide✓
8.2.3 The pH of the water will decrease / decrease to below 7.✓
8.2.4 C + O2 → CO2
(reactants✓ products✓)
(2)
(1)
(1)
(2)
[15]
QUESTION 9
9.1.1 Gas bubbles / Effervescence✓ OR The solution gets hot.✓
9.1.2 Hydrogen✓
9.1.3 Mg + 2HCℓ → MgCℓ2 + H2✓ Balancing✓
(1)
(1)
(2)
9.2.1 When the length of the magnesium ribbon increases, the amount of
hydrogen gas that forms, increases.
OR
If a longer piece of Mg ribbon is used, then more hydrogen gas will form.
Criteria
Both variables are mentioned.
Length of Mg ribbon; Amount of gas
The relationship between them are
mentioned.
Marks
1
1
9.2.2 (a) Independent variable - length of Mg/magnesium ribbon✓
(b) Dependent variable - amount of H2/hydrogen gas✓
(2)
(2)
[8]
QUESTION 10
10.1
10.2
10.3
Calcium chloride✓
H2O✓
Carbon dioxide / CO2✓
(1)
(1)
(1)
10.4
CaCO3 + 2HCl → CaCl2 + CO2 + H2O
(both reactants✓ CaCl2✓ CO2 and H2O✓ balancing✓)
(4)
10.5
When the gas (CO2) is bubbled through clear lime water,✓
it will turn milky.✓
TOTAL SECTION B:
GRAND TOTAL:
(2)
[9]
80
100
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