Why rising air brings rain
Warm air rises near the Equator. Follow what happens next.
Uneven heating
The Sun’s energy is more concentrated near the Equator. The surface warms the air above it.
Air rises
Warm air expands and becomes less dense than surrounding air. Rising air helps create lower surface pressure.
Air cools
As air rises into lower pressure, it expands and cools. Water vapour may condense into tiny droplets when the air becomes saturated.
Clouds and rain
Droplets can grow large enough to fall as rain. Rising air helps explain the frequent rain near the Equator.
Air sinks elsewhere
In the Hadley circulation, air descends around 30° north and south. It warms as it sinks, reducing relative humidity and often limiting cloud formation.
Try it yourself
A coastal place near the Equator is often wet. Explain why.
One possible answer
Strong surface heating makes air rise. As it rises, it expands and cools. Water vapour can condense, forming cloud droplets that may grow and fall as rain.
Check your answer: did you address the question, use accurate evidence and explain the link?
Check your understanding
Does low pressure mean the air must always produce rain?
Check the explanation
No. Rising air supports cloud formation, but moisture and other conditions matter. Pressure alone does not guarantee rain.
Put it to use
Sources and teaching notes
Original teaching sequence. Artwork is an imagined editorial scene, separate from geographical evidence.