1. Chapter 6 Weather

2. An area’s short term (usually a day) atmospheric condition Differs from climate which is weather over a long period of time Climate Determined by average temperature and precipitation over a period of time (usually a year) Climate then determines an areas biome

3. Troposphere is where we live Where weather happens Stratosphere contains the ozone layer Block out harmful UV light from sun

4. Caused by 4 factors 1.Uneven heating of the Earth’s surface 2.Evaporating water creating convection cells 3.Rotation of the Earth- spins faster at the equator than at the poles causing prevailing winds 4.Seasons- caused by the tilt of the Earth

6. Warm air, less dense (rises) Cool air, more dense (sinks) Moist air, less dense (rises) Dry air, more dense (sinks) Fig. 6.5

9. Dry woodlands and shrublands (chaparral) Temperate grassland Temperate deciduous forest Boreal forest (taiga), evergreen coniferous forest (e.g., montane coniferous forest) Arctic tundra (polar grasslands) Tropical savanna, thorn forest Tropical scrub forest Tropical deciduous forest Tropical rain forest, tropical evergreen forest Desert Ice Mountains (complex zonation) Semidesert, arid grassland Tropic of Capricorn Equator Tropic of Cancer

10. Earth spins faster at the equator than at the poles Causes prevailing winds

13. Ocean currents help to mix nutrients and dissolved oxygen, as well as influence the climate of coastal regions Winds blowing westward push surface waters away from the coast and cold, nutrient rich water takes its place (upwelling) Upwelling leads to high productivity

14. Every 3 to 7 years, the interaction of the Earth's atmosphere and ocean cause surface currents in the tropical Pacific Ocean to reverse direction.