S4.14.3 For the adult
Winds, monsoons and storms
Hana lives on a coast. In the afternoon a cool wind blows in from the sea, and at night the wind blows out to sea. Why?
What this chapter teaches
Land warms and cools faster than the sea, so air rises over the warmer side and wind blows along the ground from the cooler side: a sea breeze by day, a land breeze by night. A monsoon is the same idea over the seasons. A tropical storm forms over warm sea, is fed by the heat given out as vapour condenses, and weakens over land.
Three questions to ask
There is no one right wording. Listen for the idea.
- Why does a sea breeze blow by day and a land breeze by night?
- What is a monsoon, and why does it have a wet season and a dry season?
- What does a tropical storm need to form, and why does it weaken over land?
After the chapter, the learner can
- Explain land and sea breezes using convection
- Explain how monsoons and tropical storms form
What they copy into their notebook
Day: land warmer, air rises over land, sea breeze. Night: sea warmer, land breeze. Monsoon: wind turns with the season. Storm: warm sea, spirals, eye calm, eyewall fierce.