Question

Why is it important that we only test ONE factor (fertilizer) at a time? Why would it be bad, for example, to test BOTH fertilizer AND amount of light at the same time?

Answer 1

Answer:

it changes the result

Explanation:

when you add something like sunlight to a test it can change the result

Answer 2

it wouldent be a fiar test and you wouldent know what outcome would have caused he result