Question

Why is it important to use the same amount of something when you do an experiment twice?

Answer 1

Give a scientific reason, not just "So ya don't mess it up!"

Answer 2

That way the experiment won't be biased.

Answer 3

If you did change it, then it wouldn't come out with right results

Answer 4

Do you need a more scientific explanation or is that good?

Answer 5

If your are trying to prove something, you have to keep a consistent amounts of starting material. It will help you reach an accurate conclusion.

Answer 6

Well for one if it changes than its not constant