Chemistry / Unit 1 Chem 0009 short lesson, about 20 seconds
Theory
Captions available
The idea
A scientific theory is a well-substantiated explanation of a natural phenomenon, built from confirmed hypotheses and tested repeatedly against observations.
In practice
Atomic theory explains countless observations, from fixed reaction ratios to gas behavior, under one framework, surviving a century of tests.
Where people slip
In speech "theory" means a guess; in chemistry it means an explanation with extensive, repeated support, not a first hunch.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
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