GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In a controlled experiment, how many variables can be worked with at a time?
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one
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none
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two or more
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how ever many makes sense.
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Explanation:
Detailed explanation-1: -A controlled experiment requires at least two variables: a manipulated variable and a response variable.
Detailed explanation-2: -In a science experiment, only one variable is changed at a time (the independent variable) to test how this changes the dependent variable. The researcher may measure other factors that either remain constant or change during the course of the experiment but are not believed to affect its outcome.
Detailed explanation-3: -Every experiment should have only one independent variable. If the question were “How much sun and water does a plant need?” two things would be being studied at once-sun and water, which would be confusing. It’s important to change only one variable at a time.
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