6th Grade Science Review #4

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Across
  1. 3. Produces the most CO2
  2. 5. Indirect sunlight
  3. 9. Forms when pressure, temperature, or chemical processes change existing rock.
  4. 10. The process by which water, wind, ice and changes in temperature break down rocks.
  5. 13. Frozen part of Earth's water system.
  6. 14. In both cells, gel like materials that surrounds the internal part of the cell.
  7. 15. Produces electricity turning turbines.
  8. 16. An organism that obtains its energy by eating other organisms
  9. 17. Worms, insects, fish, mammals
  10. 19. Responsible for seasons
  11. 20. Huge harm done to the environment because of the harmful emission.
Down
  1. 1. All the rocks, minerals and ground.
  2. 2. Small unit of life
  3. 4. The Earth's tilt is responsible for the...
  4. 6. Earth spins on its axis, it takes 24 hours
  5. 7. Produces energy to power the cell
  6. 8. Easy to mine, abundant, cost effective
  7. 11. Cycle Igneous rock, Sedimentary rocks, metamorphic rocks
  8. 12. Comes from the heat generated deep within Earth's core
  9. 18. Mushrooms, molds, yeasts