Question

Which describes the movement of a fluid during convection?

Warm and cool fluids rise.
Warm and cool fluids sink.
Warm fluid rises and cool fluid sinks.
Warm fluid sinks and cool fluid rises.

Answer 1

Warm fluid rises and cool fluid sinks.

Explanation: Heating reduces a fluid's density so it becomes buoyant and rises; cooling increases density so the fluid sinks, creating convective currents.