| A | B |
|---|
| temperate forest | receives about 180 cm of precip per year. located between polar regions and tropics. Has defined seasons: spring, summer, fall, and winter. |
| grasslands | Receives about 70 cm of precipitation per year. Open and flat covered with grasses. Their are two types: tropical and savanna. |
| tropical rain forest | Receives about 350 cm of precipitation per year. Found near the earth's equator. Support the world's greatest diversity of plants and animals. |
| tundra | Coldest and snowiest biome. Frozen for 10 months per year |
| Desert | Recevies less than 25 cm of precipitation per year. There hot ones and cold ones. |
| Boreal Forest | Where many of the world's coniferous, or pine trees are located. Found in the northern portion of North America. |
| primary succession | predictable change that occurs where no ecosystem previously existed. Caused by a glacier or volcano. |
| secondary succession | predictable change in an environment where an ecosystem existed. Caused by a tornado, hurricane, forest fire, etc. |
| pioneer species | the first plant or animal to live in a destroyed area |
