What is a controlled experiment? A. one variable is changed at a time B. none of the variables are changed C. all variables are kept constant D. two variables are changed at a time

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asked Apr 11, 2020 221k views

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What is a controlled experiment?

A. one variable is changed at a time

B. none of the variables are changed

C. all variables are kept constant

D. two variables are changed at a time

Chemistry
high-school

Khelben asked

by Khelben

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2 Answers

6 votes

c is becsuse it just souds right

Sathishvj answered Apr 13, 2020

by Sathishvj

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4 votes

A- one variable is changed at time maybe

Adayzdone answered Apr 15, 2020

by Adayzdone

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