Across
- 1. the process that breaks rocks into smaller pieces
- 3. under the topsoil, lighter in color, pieces of broken rock, tree roots and water
- 7. Humus provides _________ to the soil
- 8. soil mixture of sand, silt, and clay
- 10. soil is made up of tiny pieces of _________, humus, water, and air
- 11. the top layer of soil where most plants grow
Down
- 2. the movement of weathered materials by wind, water, and gravity
- 4. is made up of the remains of plants and animals that were once alive
- 5. liquid that can cause weathering to rocks
- 6. below the subsoil, mostly rock
- 9. the layer of loose material that covers earth's land