Earth's Systems

2. The shape of the land.
3. Features such as coastlines, dunes, and mountains.
7. A hill of sand piled up by the wind.
9. The boundary between the land and the ocean or a lake.
11. The constant flow, or cycling, of matter through the Earth system requires this.
12. A force that shapes the topography in the geosphere by creating mountains and other huge landmasses.

1. The frozen component of the hydrosphere.
4. The part of Earth that is made up of air and dust particles.
5. An example of this type of feedback is a glacier melting.
6. When mapmakers determine distances and elevations using instruments and the principles of geometry.
8. Most of Earth's mass is in the form of rock and metal.
10. A landform that is created by the accumulation of sediments transported by a river.