5.2 Types of rainfall

Question 1

Convectional rainfall

Answer 1

When the land becomes hot, the air above it becomes warmer, expands and rises. as it rises, the air cools and its ability to hold water vapour decreases. condensation occurs and clouds develop. if the air continues to rise, rain will fall.

Question 2

Cyclonic rainfall

Answer 2

This happens when warm air, which is lighter and less dense, is forced to rise over cold, denser air. as it rises, the air cools and its ability to hold water vapour decreases. Condensation occurs and clouds and rain form.

Question 3

Orographic rainfall

Answer 3

When air is forced to rise over a barrier, such as a mountain, it cools and condensation takes place forming rain. the leeward (downward) slope receives relatively little rain, which is known as the rain shadow effect