1. Experimental Design
Unit I Practice Quiz

2. What is an Independent Variable?
The variable that gets changed or tested in an experiment.
A variable that is kept the same throughout an experiment.
The variable that is measured in an experiment
None of the above.
All of the above.

3. Answer:
The variable that gets changed or tested in an experiment. It is what you change.

4. What is an dependent Variable?
The variable that gets changed or tested in an experiment.
A variable that is kept the same throughout an experiment.
The variable that is measured in an experiment
None of the above.
All of the above.

5. Answer:
The variable that is measured in an experiment.

6. What is an Control/Constant Variable?
The variable that gets changed or tested in an experiment.
A variable that is kept the same throughout an experiment.
The variable that is measured in an experiment
None of the above.
All of the above.

7. Answer:
A variable that is kept the same throughout the experiment.

8. What is a control group? What is and experimental group?

9. Answer:
A Control group is the group that is used to compare against the experimental group. Generally, it is a “normal group” that doesn’t have a variable changed.
The experimental group is the group in an experiment that has had a variable changed in order to test and gather data in regards to the hypothesis.

10. How many variables should be tested at once?

11. Answer:
1 variable should be tested at once to ensure that the data is a result of the change in one single variable.

12. Why are repeated trials necessary?

13. Answer:
To ensure that the data collected is reliable and correct.

14. Create your own experiment using the terms described in this quiz.