Learn how air pressure creates wind, and understand what causes storms and cyclones.
Air moves from areas of high pressure to areas of low pressure, creating wind. Warm air rises and creates lower pressure, while cool air sinks and creates higher pressure.
Why does wind blow from the sea toward the land during the day near coastal areas?
Land heats up faster than the sea, creating lower pressure over land, so cooler, higher-pressure air from the sea flows in
What happens to air pressure when air is heated?
It decreases, since warm air becomes less dense and rises
A cyclone forms when warm, moist air rises rapidly over the ocean, creating a large rotating storm system with very low pressure at its centre.
What condition is necessary for a cyclone to form?
Warm, moist air rising rapidly over warm ocean water
Why are cyclones associated with very strong winds?
The large difference between the low pressure at the centre and higher pressure outside causes air to rush in rapidly, creating strong winds
1. What causes wind?
2. What happens to air pressure when air is heated?
3. What is necessary for a cyclone to form?
4. Why do cyclones have very strong winds?
5. Why is coastal warning important before a cyclone?