| A | B |
| climate zones | polar, temperate, tropic |
| polar characteristics | gets the least amount of radiation from the sun, it is never warm, always cold |
| temperate characteristics | receives stronger radiation from the sun during the summer and less radiation during the winter |
| tropic characteristics | temperatures are always hot, receive the most solar radiation |
| climate | the pattern of weather that occurs in an area over many years |
| greenhouse effect | a natural heating process that occurs when certain gases in the Earth's atmosphere traps heat |
| greenhouse gases | water vapor, carbon dioxide, methane |
| global warming | worldwide increase of temperatures |
| carbon dioxide | greenhouse gas which humans are making too much of |
| weather | happens right now |
| factors that determine climate | latitude, elevation, proximity to large bodies of water, and proximity to mountains |
| two ways humans effect climate | creating more carbon dioxide and cutting down trees |