What is Science?
Review
This slide show will present a question, followed by a slide with an acceptable answer.
For some questions, there is a definite correct answer. For other questions, several answers may be correct.
What is SCIENCE?
There are several correct answers to this question; list as many as you can.
5/24/2010
1

What is SCIENCE?
• A way to answer questions & solve problems
• How we understand the world around us
• A way or process used to investigate what is happening around you
• It provides possible answers
5/24/2010
We answer scientific questions & solve problems with 2 types of research.
What are the two types?
2

We answer scientific questions and solve problems with 2 types of research.
What are the two types?
1.Descriptive Research
2.Experimental Research
5/24/2010
Describe
DESCRIPTIVE RESEARCH
3

Describe
DESCRIPTIVE RESEARCH
• Based mainly on Observations
• Used when experiments are impossible to perform
• Involves the following:
– Stating the research objective
– Describing the research design
– Eliminating bias
5/24/2010
Describe
EXPERIMENTAL RESEARCH
4

Describe
EXPERIMENTAL RESEARCH
Experimental research includes investigations that:
• Have variables
• Test hypotheses
• May have a control or control group
• Is a set of planned steps
• Tests one variable at a time
Describe
VARIABLE
5/24/2010
5

Describe
VARIABLE
A part of an investigation that can be CHANGED
5/24/2010
List the
3 TYPES OF VARIABLES
6

List the
3 TYPES OF VARIABLES
1.Independent Variable
2.Dependent Variable
3.Controlled Variable
5/24/2010
Explain
INDEPENDENT VARIABLE
7

Explain
INDEPENDENT VARIABLE
• The variable that can be changed during an experiment
• The variable that the scientists chooses to change
• The variable that may cause a change in the dependent variable
5/24/2010
Explain
DEPENDENT VARIABLE
8

Explain
DEPENDENT VARIABLE
•The factor that is being measured in an experiment
•The variable that is measured by scientists
•The variable that may change because of the independent variable
Explain
CONTROLLED VARIABLE
(CONSTANT)
5/24/2010
9

Explain
CONTROLLED VARIABLE
(CONSTANT)
•Variable that stays the same during an experiment
•Variable that is controlled by the scientist
•Variable that is not allowed to change
What is the difference between
Science and Technology ?
5/24/2010
10

What is the difference between
Science and Technology ?
Technology is the application of science;
Science gaining knowledge
Technology using knowledge
How do scientists OBSERVE?
5/24/2010
11

How do scientists OBSERVE?
Using the 5 senses:
•Hearing
•Touch
•Smell
•Sight
•Taste
5/24/2010
Explain how to RECORD DATA
12

Explain how to RECORD DATA
Data Tables
• A way to record results and observations accurately
• Have a descriptive title
• Divided into columns & rows
• Shows the independent variable
• Provides a place to record the dependent variable
How do scientists
COMMUNICATE the results of their work?
5/24/2010
13

How do scientists
COMMUNICATE the results of their work?
• Reported in scientific journals
• Science journals
• Presentations to other scientists
5/24/2010
Describe how to ANALYZE DATA
14

Describe how to ANALYZE DATA
• Reduce the data with the best measure of central tendency
• Graph the data
• Look for patterns and relations
• Look at the shape of the graph
What do scientists do when they
DRAW CONCLUSIONS?
5/24/2010
15

What do scientists do when they
DRAW CONCLUSIONS?
• Answer the original question
• State whether or not the hypothesis was supported (it is never “right” or “wrong”)
• Pose questions for further research
5/24/2010
Define HYPOTHESIS
16

Define HYPOTHESIS
• A statement that can be tested by conducting an experiment
• Prior knowledge, new information, observations can be used to form a hypothesis
5/24/2010
Why are REPEATED TRIALS necessary in an experiment?
17

Why are REPEATED TRIALS necessary in an experiment?
• To make sure results are valid
• The more trials conducted, the more likely the results are reliable
• To make sure a “fluke” is not considered the true result
5/24/2010
Why do scientists use
MODELS?
18

Why do scientists use
MODELS?
To save time and money when testing ideas that are
• Very large
• Very small
• Dangerous
• Time-consuming
When are GOGGLES required?
5/24/2010
19

When are GOGGLES required?
When using
• Chemicals
• Heat
• Sharp objects
5/24/2010
Explain the Science Department
Late Work Policy
20

Explain the Science
Department Late Work Policy
No late work is accepted.
5/24/2010
What is the PROCEDURE for the Start of Class?
21

What is the PROCEDURE for the Start of Class?
• Come into the room and sit in your assigned seat.
• Read the AGENDA and copy assignments into your agenda. The agenda is located on the bulletin board to the right of the door.
• Read the instructions of the television / overhead projector and follow the directions.
5/24/2010
22