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23 January, 09:05

One tank of goldfish is feed once a day, a second tank twice a day, and a third tank four times a day during a six-week study. the fishes' body fat is recorded. what is a controlled variable?

a. body fat of fish

b. type of goldfish

c. amount of food

d. number of times fish are feed/day

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  1. 23 January, 09:18
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    The controlled variable is what stays the same. So it’s C. They are given different amounts but the same food.
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