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What is a controlled experiment? a.two variables are changed at a time b.all variables are kept constant c.none of the variables are changed d.one variable is changed at a time
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What is a controlled experiment?

a.two variables are changed at a time

b.all variables are kept constant

c.none of the variables are changed

d.one variable is changed at a time

User Tomer Shiri
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1 Answer

4 votes

Answer:d

Step-by-step explanation:

Only one is changed being the independent variable. Adjusted to see the effects of the system being studied.

User Sebazelonka
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