| A | B |
|---|
| Geosphere | The solid part of Earth |
| Gravity | The force that every object exerts on all other objects because of their masses |
| Density | The mass per unit of volume of a substance |
| Crust | The brittle, rocky outer layer of Earth |
| Mantle | The thick middle layer in the solid part of Earth |
| Lithosphere | The rigid outermost layer of Earth that includes the uppermost mantle and crust |
| Asthenosphere | The plastic-like, flowing layer of the mantle below the lithosphere |
| Core | The dense, metallic center of Earth |
| Magnetosphere | The outer part of Earth’s magnetic field that interacts with charged particles |
| Landform | A topographic feature formed by processes that shape Earth’s surface |
| Relief | The difference in elevation between the highest and lowest point in an area |
| Plain | A landform with low relief and low elevation |
| Plateau | A landform with low relief and high elevation |
| Mountain | A landform with high relief and high elevation |
| Elevation | The height above sea level of any point on Earth’s surface |
