| A | B |
|---|
| orbit | oval shaped path |
| revolution | circular journey |
| axis | an imaginary line running through the Earth betwenn the North and South Poles |
| low latitudes | the tropics |
| high latitudes | the polar zones |
| middle latitudes | the temperate zones |
| Tropic of Cancer | 23 1/2 degrees North (latitude) |
| Tropic of Capricorn | 23 1/2 degrees South(latitude) |
| Arctic Circle | 66 1/2 degrees North(latitude) |
| Antarctic Circle | 66 1/2 degrees South(latitude) |
| landforms | shapes and types of land |
| mountains | landforms that rise usually more than 2,00 feet above sea level |
| hills | lower and less steep that mountains with rounded tops |
| plateau | large, mostly flat area that rises above the surrounding land |
| plains | are large areas of flat or gently rolling land |
| plate tectonics | the Earth's outer crust is divided into huge pieces |
| plates | huge peices of the Earth's crust |
| weathering | process that breaks rocks down into tiny pieces |
| atmosphere | thick layer of special gases that surround the Earth |
| erosion | as a result of weathering small pieces of rock are carried to new places |
| Ring of Fire | 90 % of the world's earthquakes and many of the world's active volcanoes occur here |
| Pangaea | millions of years ago the continents were one huge mass |
| weather | day to day changes in the air |
| temperature | how hot or cold the air feels |
| precipitation | water that falls to the ground in the form of rain, sleet, snow or hail |
| climate | average weather of a place over many years |
| Gulf Stream | warm, fast-moving river in the Atlantic Ocean |
| Peru Current | Colfd water that moves from Antarctica along the coast of South America |
| California Current | cold water passing by California on it's way from Alaska |
| vegetation | plants that grow naturally in a place |
| canopy | the uppermost tree branches in the forest |
| tundra | lies along the Arctic Circle, has short cold summers, and short even colder winters |
| vertical climate | climate changes accourding to height of the location |
