Across
- 4. The process that moves rocks and soil from one place to another.
- 6. A part of the topsoil that contains decayed matter, such as dead leaves and animal bits, that adds extra nutrients.
- 7. To protect the Earth's environment through the careful use and preservation of our natural resources.
- 9. Resources that come directly from the Earth and are useful to humans, such as wood and water.
- 10. The part of soil that is between the size of sand and clay grains.
- 11. Soil provides a habitat for many organisms, such as insects and worms.
- 12. Soil is created by water, weather, and living things over _________.
- 13. The original object from which soil was formed by the effects of erosion and weathering.
Down
- 1. ____ is important to an ecosystem.
- 2. Materials that plants and animals need to live and grow.
- 3. The upper layer of the soil, full of organic matter and best for plant growth.
- 5. The wearing down of hard rock by the forces of nature that breaks rocks apart.
- 8. A type of soil that is made of very tiny bits of earth, holds water well, and provides nutrients.
- 10. Made of worn-down rock and minerals, this part of soil does not hold water well.