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1.1.4 quiz: the practice of science
experiment 1: a group of students did a test to see if the
acidity of water affects the growth of pea plants. they
followed a logical method and performed their experiment
once, using a control group and experimental groups. the
results supported their hypothesis.
experiment 2: a group of students did a test to see if the
acidity of water affects the growth of bacteria in the water.
they used a control group and experimental groups. they
repeated their experiment several times and received the
same results each time.
which experiment is more likely to be reliable, and why?
a. experiment 2, because it gave the same results every time
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b. experiment 1, because it followed a logical method
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c. experiment 2, because its setup included a control group