Describe convection?

Convection occurs when heat is transferred through a gas or liquid by the hotter material moving into a cooler area

Explanation:

Convection is the circular motion that happens when warmer air or liquid - which has faster moving molecules, making it less dense - rises, while the cooler air or liquid drops down.

Convection is the circular motion that occurs when warmer air or liquid - which has moved molecules quicker, making them less dense - rises, when cooler air or liquid drops down