| A | B |
|---|
| horizon | the point where the earth and sky appear to meet |
| hemisphere | half of the Earth |
| peninsula | area of land surrounded by water on 3 sides |
| bay | part of the sea or lake that cuts into a coastline |
| natural resource | material found in nature that people can use |
| renewable resource | a natural resource that can be replaced, with careful planning after it is used |
| nonrenewable resource | a resource that cannot be replaced after it is used |
| mineral | substance that comes from the Earth and is removed by mining |
| fossil fuel | fuel formed in the earth from ancient plant and animal remains |
| aggregates | crushed rocks used in construction projects |
| arable land | farmable land |
| cultivated forest | forest grown with help from people |
| domesticated | animal tamed by people |
| reservoir | place where water is collected for future use |
| watershed | area of leand over which surface water flows to a single collection place |
| natural forest | forest that grows without help from people |
| groundwater | water beneath the surface that consists mostly of surface water that seeps down |
| aquatic organism | plant or animal that lives in water |
| pollute | to harm water, air, or land by making it dirty |
| erosion | the wearing away of soil by water or wind |
| conserve | to use something wisely so that it is not wasted or destroyed |
| climate | the weather a place has over a long period of time |
| temperate | weather that is not too hot or too cold |
| drought | a period when rainfall is far below normal |
