| A | B |
|---|
| climate | the pattern of weather over a long period of time |
| arid | hot and dry all year with very little rain |
| landform | any natural feature of earth's surface that has a distinct shape |
| vegetation | all the plants and trees in an area |
| population density | the average number of people who live in a unit of area such as a square mile |
| region | an area set apart from other areas |
| thematic map | a map that shows a particular theme |
| physical feature | any natural characteristic of earth's surface such as landforms and bodies of water |
| commercial farming | farmers raise crops and livestock to sell |
| subsistence farming | farmers grow enough crops to feed their families |
| hunting and gathering | when people hunt animals and gather plants for food |
| tundra | very cold winters, and very cold summers |
| commercial fishing | when poeple fish all over the world |
| ice cap | very cold all year with permanent ice and snow |
| economic activity | any action that relates to the making, buying, and selling of goods and services |
