| A | B |
|---|
| axis | an imaginary straight line from the North Pole, through the Earth's center, to the South Pole |
| climate | the average weather conditions of an area over a long period of time |
| equator | an imaginary line circling the middle of Earth, halfway between the North Pole and the South Pole |
| ice age | a period of time when glaciers covered much of Earth's land |
| Northern Hemisphere | the half of Earth north of the equator |
| polar climate | a very cold climate that does not receive much energy from the Sun |
| Southern Hemisphere | the half of the Earth south of the equator |
| temperate climate | a climate that generally has warm, dry summers and cold, wet winters |
| tropical climate | a hot, rainy climate ... areas near the equator |
