| A | B |
|---|
| Topography | the shape of the land; it may be flat, hilly, sloping or mountainous |
| Elevation | the height above sea level |
| Relief | the difference in elevation between the highest and lowest parts |
| Landforms | a feature formed by the process that shapes Earth's surface |
| Landform region | A large area of land where the topography is similar |
| Plain | made up of flat or gently rolling land with low relief |
| Mountains | has high elevation and high relief |
| Mountain range | group of mountains that are closely-related in shape, structure, and age |
| Plateau | has high elevation and more or less a level surface. |
| Lithosphere | the solid rock outer layer; this is the continents and islands and ocean floor |
| Atmosphere | The outermost sphere; the gases that surround the planet |
| Nitrogen & Oxygen | The most abundant gases that surround the Earth |
| Hydrosphere | Earth's oceans, lakes, rivers, and ice |
| Biosphere | means all living things |
| Core | the center of the Earth |
| Mantle | solid material that is less dense than the material that makes up the core |
| Crust | made up of rock |
The center layer of the Earth,  | Core |
