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Free Exam: Controls and Variables

Number of Questions in Test: 4

Note: Answers are not shown below but will be copied with this test.

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Question 1

A scientist testing the affects of a chemical on apple yield, sprays an orchard with the chemical. A second orchard does not receive the chemical. In the fall, the number of apples harvested from each forest is counted. Which of the following is the independent (manipulated) variable in the experiment?

Type: Multiple choice
Points: 1
Randomize answers: No

Question 2

The orchard sprayed with the chemical yields an average of 60 apples per tree, the other orchard yields an average of 40 apples per tree. Based on the data, the scientist would:

Type: Multiple choice
Points: 1
Randomize answers: No

Question 3

In order for the apple tree experiment to be valid scientifically, both orchards must:

Type: Multiple choice
Points: 1
Randomize answers: No

Question 4

If a theory is challenged by new evidence, which of the following could occur?

Type: Multiple choice
Points: 1
Randomize answers: No

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