Question

practice it! the students in miss baileys science class want to know how the amount of salt in water affects the growth of guppy fish. they prepare three environments in which to grow the guppy fish. each environment gets the same amount of salt in its water. after several days, the students cannot come up with a conclusion. they see no patterns in the data. which of the following is something the students can do to improve their experiment? put different kinds of fish in each environment put a different amount of salt in each environment grow all the guppy fish in one environment count the guppy fish that grew in each environment

Explanation:

The students want to study the effect of salt - amount on guppy growth. But they used the same salt - amount in all environments, so no patterns were seen. To improve, they should vary the salt - amount as that is the independent variable they want to test.

Answer:

B. Put a different amount of salt in each environment