| A | B |
|---|
| Climate | Average annual conditions of temperature, precipitation, winds, and clouds in an area |
| Tropical Zone | Area near the equator between 23.5 N and S latitude |
| Polar Zone | Areas near both poles from about 66.5 to 90 N or S latitude |
| Temperate Zone | Areas Between the tropical and the polar zones |
| Marine Cimate | Climate of some coastal regions, with warm winters and cool summers |
| Continental Climate | Climate of the centers of continents, with cold winters and warm or hot summers |
| Windward | Side of the mountain that faces the oncoming wind |
| Leeward | Side of the mountain that faces away from the oncoming wind |
| Monsoon | Sea or land breeze over a large region that changes direction with the seasons |
| Ice Age | Time in Earth's history during which glaciers covered large parts of the surface |
| Aerosol | Solid particles or liquid droplets in the atmosphere |
| Sunspot | Dark area of gas on the sun's surface that is cooler than surrounding gases |
| Greenhouse Gas | Gases in the atmosphere that trap energy |
| Fossil Fuel | Coal, oil, or natural gas that forms over millions of years from the remains of ancient organisms |
| Global Warming | Gradual increase in the average temperature of the atmosphere, thought to be caused by an increase in greenhouse gases from human activities |
| Subarctic | Climate zone that lies north of the humid continental climates |
| Savanna | Grassland located close to the equator that may include shrubs and small trees |
| Steppe | Prairie or grassland found in semiarid regions |
| Desert | Dry region that on average receives less than 25 cm of precipitation per year |
| Tundra | cold, dry biome climate region with short, cool summers and bitterly cold winters |
