Climatology Grade 12

2. – The movement of air from an area of high pressure to low pressure.
3. – An overflow of water onto land that is normally dry.
5. Pressure – The force exerted by the weight of air on the Earth’s surface.
6. – A large-scale system of winds rotating around a low-pressure centre.
9. – The condition of the atmosphere at a particular place and time.
11. – The scientific study of climates and long-term weather patterns.
12. – The amount of water vapour in the air.
13. Cover – The amount of the sky covered by clouds.
14. – The layer of gases surrounding the Earth.
15. Change – Long-term changes in temperature, rainfall, and weather patterns.
18. Effect – The warming of Earth caused by gases trapping heat in the atmosphere.
19. Mass – A large body of air with similar temperature and moisture characteristics.
21. – A long period with very little or no rainfall.
22. – The process where liquid water changes into water vapour due to heat.
24. – The process where water vapour cools and changes into liquid water droplets.

1. – A high-pressure weather system usually associated with clear skies.
4. Layer – A layer in the atmosphere that absorbs harmful ultraviolet radiation from the Sun.
7. – The scientific study of weather and the atmosphere.
8. – A prolonged period of unusually hot weather.
10. – A measure of how hot or cold the air is.
13. – The average weather conditions of a place over a long period of time, usually 30 years or more.
16. – Any form of water that falls from the atmosphere, such as rain, snow, hail, or sleet.
17. Warming – The gradual increase in Earth’s average temperature.
20. – A boundary between two different air masses.
23. Point – The temperature at which air becomes saturated and condensation occurs.