| A | B |
|---|
| ecosystem | an environment, its living and nonliving elements, and how they work together |
| vegetation | plant life |
| soil | mixture of rock particles and decayed plant material |
| succession | changes in the plantlife of an ecosystem |
| climax vegetation | the final stage of succession |
| needleleaf forest | trees which keep their leaves year round |
| broadleaf forest | trees lose their wide leaves each fall |
| rain forest | wide leafed evergreen trees |
| savanna | tall grassland with some trees |
| prairie | tall and medium grasslands |
| steppe | short grassland |
| adapt | plants and animals change to survive |
| desert | ecosystem found in arid climates |
| oasis | place in a desert with fresh water |
| acid rain | pollution mixes with rain water |
| greenhouse effect | leads to global warming |
| ozone layer | protects us from UV radiation |
| overfishing | damages oceanic ecosystems |
| irrigation | can reduce groundwater and add salt to soil |
| hibernation | one way animals adapt to climate |
