ACT Preparation / Unit 20 ACT 1904 short lesson, about 20 seconds
Science Tests, It Does Not Prove
Captions available
The idea
Experiments can support a hypothesis or disprove it, but science does not claim to prove anything final; its understandings stay open to change with new evidence.
In practice
Ten trials that fit a hypothesis support it; one well-run trial that contradicts it calls it into question.
Where people slip
An answer saying an experiment proved a hypothesis overstates what results can do.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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