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6. An experiment

A. is performed under controlled conditions.
B. generally tests how one variable is affected by another.
C. contributes important evidence that helps scientists better understand the natural world.
D. all of the above.


Sagot :

Final answer:

An experiment is a scientific investigation performed under controlled conditions, testing variables and contributing evidence to enhance scientific understanding.


Explanation:

An experiment is a special type of scientific investigation that is performed under controlled conditions, usually in a laboratory. It involves manipulating variables to observe their effects and contributing important evidence to better understand the natural world. In an experiment, the researcher typically manipulates an independent variable to see how it affects a dependent variable.


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