Unit 4: Earth Systems Review

12345678910111213141516171819202122232425
Across
  1. 4. The process that occurs when an object rusts.
  2. 6. Longest time unit in the geological time scale.
  3. 7. Example of something you can add when your soil is lacking organic content.
  4. 8. The percentage of the total volume of a rock or sediment that consists of open spaces.
  5. 9. A logarithmic scale used to express the energy released by an earthquake.
  6. 11. Measure of salt content in soil.
  7. 15. The physical breakdown of rock into sediments over time.
  8. 18. Starting place for an Earthquake underneath the Earth's.
  9. 22. The process by which oceanic crust sinks beneath another plate at a convergent plate boundary.
  10. 23. The ability of water to flow through a soil sample.
  11. 24. Large accumulation of calcium carbonate in soil.
  12. 25. An area where rock from deep within the mantle melts and the magma rises to the crust above it.
Down
  1. 1. The percentage of the different types of sediments in a sample of soil.
  2. 2. Perfect agricultural soil with equal portions of sand, silt, and clay.
  3. 3. This biome has a thick layer of leaf litter in its soil.
  4. 5. Layers of soil are called this.
  5. 10. The type of boundary that occurs when two plates collide
  6. 12. Material which is added to soil to raise the pH if it is too acidic.
  7. 13. This biome has acidic soil from the breakdown of pine needles.
  8. 14. Tectonics plates that move away from one another.
  9. 16. Process by which weathered rock and soil are moved from one place to another.
  10. 17. Largest layer of the Earth.
  11. 19. A red soil type found in the tropics that is rich in oxides of iron and aluminum.
  12. 20. Material which is added to soil to lower the pH if is too basic.
  13. 21. A brittle layer of Earth made up of the uppermost part of the mantle and the crust.