| A | B |
|---|
| temperate forest | seasonal temperature changes with both deciduous and conifer trees |
| tropical forest | constant hot, humid climate with much rainfall and evergreen trees |
| grassland | flat plain that is covered with grass and has few trees and an irregular or absent period of rain |
| desert | dry with very little rain, sandy soil and a difficult place for life to survive |
| mountain | temperature variations with attitude causing extremes of cold and trees do not grow above a certain height |
| wetland | land that is often covered in water and supports plant growth above the water with an abundance of rainfall |
| ocean | water that covers 71 percent of the surface of the earth and contains plankton which is an important part of the food chain |
| polar region | long, cold winters of ice and snow with little or no daylight for months with frozen ground for most of the year and icebergs in their coastal waters |
