| A | B |
|---|
| region | a large area in which places share similar characteristics |
| landform | a natural feature of the earth's surface |
| mountain | a very high landform, often with steep sides |
| plain | an area of flat land that often is covered with grass or trees |
| desert | an area that receives less than 10 inches of rain in one year |
| canyon | a deep valley with steep rocky walls |
| plateau | a large, flat, raised area of land |
| boundary | a line or natural feature that separates one area or state from another |
| weather | the condition of the air at a certain time or place |
| climate | the weather patterns in one place over a long period of time |
| precipitation | the amount of moisture that falls as rain or snow |
| temperature | a measurement telling how hot or cold something is |
| humidity | the amount of moisture in the air |
| equator | the imaginary line that circles the center of Earth from east to west |
| elevation | how high a place is above sea level |
| tropical climate | an area that is usually very warm all year |
| polar climate | areas around the North and South Poles with the coldest temperatures |
| subartic climate | an area with short, warm summers and ground covered in snow for most of the rest of the year |
| temperate climate | moderate area between the tropical and subarctic climates |
| natural resource | something in the environment that can be used |
| raw material | something that is changed so that someone can use it |
| process | to change something so that people can use it |
| harvest | cut for use, as a crop |
| industry | a business that makes a product or provides a service |
| manufacturing | making things to use or sell |
| product | something that people make or grow |
| capital resource | something people make in order to produce other products |
| agriculture | the raising of crops or animals |
| conserve | to use resources carefully |
| renewable resource | a natural resource that can be replaced |
| recycle | to use something more than once |
| nonrenewable resource | a resource that cannot be replaced |
| human resources | a person that makes products or provides services |
| service | job that someone does for others |
