6 The Dynamic Earth U1 L5 The Dirt on Soil

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Across
  1. 4. Humus is found on the ____ ____ of soil
  2. 5. Soil ____ are used to classify different soils
  3. 7. This is one of 4 main factors that determine how long it takes for soil to form
  4. 8. This breaks down parent rock into smaller and smaller pieces
  5. 11. Each layer in the soil that has a profile that has different physical properties ____ ____
  6. 13. ____ can affect how soil forms in different regions on Earth
  7. 14. This is a vertical section of soil that shows all of the different physical properties ____ ____
  8. 15. This is a soil property ____
  9. 17. This is the remains of decayed organic matter
  10. 18. This is the spaces between soil particles ____ ____
  11. 19. Soil pH is ____ to meet the needs of the plants
  12. 21. Soil color is a clue to the types of ____ in the soil
  13. 22. Some ____ are decomposers that live in soil
  14. 23. The process of soil formation can take a very ____ time
  15. 25. Certain rocks ____ at different rates and in different ways
Down
  1. 1. This is a loose mixture of small rock fragments, organic matter, water and air that can support the growth of vegitation
  2. 2. This is the very first step in soil formation. It is the weathering of ____ ____
  3. 3. This soil is shallow and contains little organic matter ____ ____
  4. 6. Leaching gives Horizon B it's ____ color
  5. 9. Soil develops more quickly in ____ areas, than in cold areas
  6. 10. Soil ____ this is a property that is used to describe different size soil particles
  7. 12. Humus contains ____ that plants need to grow
  8. 16. This is when rain carries nutrients down from Horizon A to B
  9. 20. ____ live in Horizon A
  10. 24. Horizon C is the ____ developed soil