1. 3.4 Factors Affecting Temperature & Precipitation

2. Equator
Prime Meridian

3. Tropic of Cancer Equator Tropic of Capricorn North temperate zone
Tropic zone
Tropic of Capricorn
South
temperate zone

8. Hotter places means more evaporation of water to form clouds, which in turn leads to rain.

9. height above sea level
As elevation increases, the air gets thinner, which means less air molecules and they move slowly, producing less energy.

10. Ocean water evaporates because it is being heated by the sun
Ocean water evaporates because it is being heated by the sun. Warm air is less dense and so it rises. This warm air carries the moisture with it. As this warm air reaches high elevation, where it is cold, it sinks and condenses to produce rain. Now this “dried air” keeps moving and the other side of the mountain gets dry air (no rain) and gets a desert.

13. Look at where the deserts are compared to where the mountains are.

15. Do you think places along the coast are always milder in temperature
Do you think places along the coast are always milder in temperature? And get more rain?

17. What do you think conditions are like at the Atacama Desert?

18. Atacama Desert
Some areas haven’t had rain for 400 years. There is snow. But isn’t it on the coast? Shouldn’t it have mild weather?

19. The coast carries a cold current.

20. What if the ocean current is a cold one
What if the ocean current is a cold one? Do we still get moist air above it? No, the air above the cold current is cold, little evaporation occurs.

22. densities
temperature
salinity
wind
rotation of the earth
Generally warmer, milder
winter
Might be warm during the
day depending on latitude/elevation,
but cold nights
Lots of warm moist air, lots
of precipitation
Lack of warm moist air, little
precipitation