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Exploring PA: Ch 1
Unit 1
| Term | Definition |
|---|---|
| continent | the largest land areas on Earth |
| hemisphere | half of the Earth |
| keystone | the stone at the top of an arch that supports the weight of other stones |
| landform | a natural feature on Earth's surface |
| gorge | a deep, narrow valley with steep walls |
| tributary | a smaller river or stream that flows into a larger river |
| natural resource | material found in nature that people can use |
| fossil fuel | fuel found in the earth that is made from the remains of plants or an animal from long ago |
| renewable resource | a resource that can be replaced |
| nonrenewable resource | a resource that cannot be replaced |
| pollution | to make soil, air, or water dirty |
| conserve | to use resources carefully so they are not wasted or destroyed |
| pesticide | chemical for killing insect pests |
| climate | the pattern of weather in a place over a long period of time |
| precipitation | the weather that falls to Earth as rain, snow, sleet, or hail |
| vegetation | a variety of plants and trees |
| habitat | a place where plants and animals live |
Created by:
karinatramont
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