3.3 Convection

Question 1

As the density of the block equals its mass divided by volume, the density of a block must decrease as it gets hotter, so, what happens when a material expands and contracts?

Answer 1

When a material expands it becomes less dense when they are heated and when a material contracts it becomes denser when they are cool.

Question 2

What is the process of a convection current?

Answer 2

The fluid is heated —> The fluid expands—> The fluid becomes less dense —> The fluid floats