What is soil? pg. 129

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Across
  1. 2. Soil is mostly made up of several sizes of this.
  2. 5. The smallest pieces of rock are particles of this.
  3. 6. Humus helps soil hold this.
  4. 8. Some people call soil this.
  5. 9. Worms make these for air and water.
  6. 10. Plants and animals decay into tiny pieces called this.
  7. 11. Plants and animals do this when the die.
Down
  1. 1. If you look at soil you might see these and small pieces of gravel.
  2. 2. Plants send these into the soil.
  3. 3. This from worms also adds nutrients.
  4. 4. This material is the remains of dead plants and animals.
  5. 6. These animals are good for soil.
  6. 7. Particles of this are just really tiny rocks.