Question 3
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A man found many crickets living in his garden. He wanted to find out which brand of
pesticides is most effective in removing the crickets. He carried out the following
experiment using similar containers and kept them all under the same conditions.
Number of Crickets
Container Brand of Pesticide
Start of Experiment End of Experiment
1 X 20 8
2 Y 20 12
3 Z 20 5
Other than the number of crickets at the start of the experiment, which of the following
is an important variable that must be kept constant to make this test a fair one?
A. Brand of pesticide
B. Number of crickets at the end of the experiment
C. Amount of pesticide used
D. Size of container used
A man found many crickets living in his garden. He wanted to find out which brand of
pesticides is most effective in removing the crickets. He carried out the following
experiment using similar containers and kept them all under the same conditions.
Number of Crickets
Container Brand of Pesticide
Start of Experiment End of Experiment
1 X 20 8
2 Y 20 12
3 Z 20 5
Other than the number of crickets at the start of the experiment, which of the following
is an important variable that must be kept constant to make this test a fair one?
A. Brand of pesticide
B. Number of crickets at the end of the experiment
C. Amount of pesticide used
D. Size of container used