8.4 Natural Systems Science Summary

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Across
  1. 2. Mix of events that happen each day in our atmosphere
  2. 4. Source not depleted when used
  3. 7. The process in which materials are eroded in water
  4. 8. Used to use less energy
  5. 10. The variety of animals
  6. 13. Partly decomposed organic material that is used as fertilizer
  7. 15. Severe Weather
  8. 16. Energy that can be extracted from earth's internal heat
  9. 17. The increase in average temperatures of earth and the atmosphere due in part to increases carbon dioxide levels
  10. 19. To process used products into new products by using the materials again
  11. 20. Made from decomposing plants and animals
  12. 21. The power generated by falling water
  13. 22. The amount of carbon emitted from a person
  14. 24. A body of rock and/or sediment that holds groundwater
  15. 25. Long-term shifts in temperatures and weather patterns
  16. 26. Lightbulb needs it to light up
Down
  1. 1. Gases that trap heat
  2. 3. To use less
  3. 5. The term used to describe what happens when topsoil is washed or blown away
  4. 6. To use items again after their original use
  5. 9. Resources from nature
  6. 11. Source that runs out when used
  7. 12. Protecting something from harm or destruction
  8. 14. Renewable organic material that comes from plants and animals
  9. 18. Anything that can be naturally broken down and returned to the Earth
  10. 23. Anything that dirties the Earth