Chemistry / Chem 0008 · Atom · ~20 seconds

Hypothesis

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State

A hypothesis is a tentative, testable explanation for an observation, proposed before the supporting evidence is in hand.

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"Plants near a sunny window grow faster because they get more light" is a hypothesis — testable, since an experiment could support or undercut it.

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A hypothesis untestable by any conceivable experiment, such as "plants grow because they want to," is not scientific.