How Soil Forms

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Across
  1. 2. EXAMPLE OF HUMUS SOURCE
  2. 5. ORGANISMS THAT BREAK THE REMAINS OF DEAD ORGANISMS INTO SMALLER PIECES AND DIGEST THEM WITH CHEMICALS
  3. 6. MIXTURE OF ROCK, MINERALS, DECAYED ORGANIC MATERIAL, WATER, AND AIR
  4. 7. SUBSOIL
  5. 9. EXAMPLE OF A BURROWER
  6. 10. MEASURES HOW ACIDIC SOIL IS
  7. 12. SOLID LAYER OF ROCK BENEATH SOIL
Down
  1. 1. EXAMPLE OF DECOMPOSERS
  2. 3. EQUAL PARTS OF CLAY, SAND, AND SILT
  3. 4. TOPSOIL
  4. 8. DECAYED ORGANIC MATERIAL IN SOIL
  5. 11. PARTLY WEATHERED ROCK