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Unformatted text preview: surface, becomes less dense and rises Ground 21 Example 2: Atmospheric convection (mixing) Effects of air movement
Condensation level: Height at which air becomes saturated because of cooling (due to expansion) and condenses into cloud. = Height of bottom of cloud formation. Basic Properties of Air: Condensation level Ground 22 23 24 25 Example 3: Weather Front & Cloud Formation: When warm air meets cold air
2. Rising air expands, cools and relative humidity rises. 3. Clouds form as water vapour condenses above condensation level (white line). 1) Warmer, lighter air is forced to rise by denser cooler air. Cloud Effects of air movement Basic Properties of Air: 1) Cooler, denser air sinks Condensation downwards and level forces lighter, warmer air to rise Ground 26 NE PIC TO W Heat distribution on Earth Why does the equator get so much more heat than the rest of the planet? 27 a b
1) Unequal heat distribution: same amount of energy in less area when closer to equator. Can see this in figure by area of a greater than area of b. 28 a b
1) Unequal deflection and absorption of sun rays by atmosphere: less when closer to equator. Can see this in figure by length of column a greater than length of column b. 29 Heat distribution on Earth Why is it hotter in the summer than in the winter? 23.5 degree tilt of Earth Northern hemisph...
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- Spring '08