| A | B |
|---|
| Solar system | includes the sun and the objects that revolve around it |
| Planet | spheres that are the largest objects in the solar system |
| Moon | smaller sphere or satellite that orbit planets |
| Hydrosphere | oceans |
| Lithosphere | land that makes up part of the Earth |
| Biosphere | all people |
| Atmosphere | air we breathe |
| Landform | natural features of the Earth's surface |
| Continent | one of the seven great divisions on the globe |
| Isthmus | narrow stretch of land connecting two larger land areas |
| Peninsula | body of land jutting into a lake or ocean |
| Trench | a narrow underwater cavern |
| Continental shelf | underwater extension of the coastal plain |
| Continental slope | underwater land that decends gradually to a sharp drop to the ocean floor |
