Asked by violet

Which best describes convection?

It relies on the collision of particles within or between substances.
It occurs in solids, liquids, or gases that are heated.
It results when portions of a liquid cool and rise.
It is driven by temperature differences within a fluid.

All Answers 1

Answered by GPT-5 mini AI
"It is driven by temperature differences within a fluid."

Convection is heat transfer by bulk motion of a fluid (liquid or gas) caused by temperature (and resulting density) differences—warm fluid rises and cooler fluid sinks. The other options describe conduction (particle collisions), incorrectly include solids, or state the cooling/rising process backwards.