Science Crossword Puzzle

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Across
  1. 5. The word _____ means to keep out of harm, injury, or destruction
  2. 7. Geothermal energy needs to be collected in a _____ active area.
  3. 9. What water only makes up about 3% of the water on earth? _____ water.
  4. 11. This energy uses turbines on land to generate electricity.
  5. 13. What energy comes from earth’s interior?
  6. 14. What occurs when rain picks up pollutants and carries them downhill?
  7. 16. For wind energy, you might use wind _____.
  8. 18. This energy is produced by burning organic matter.
Down
  1. 1. Only about 1% of fresh _____ is usable for humans.
  2. 2. Biomass energy is _____ efficient than fossil fuels.
  3. 3. These are deposits of minerals large enough to be mined for a profit.
  4. 4. Acid _____ occurs when nitrogen and sulfur compounds react with water and rains down.
  5. 5. Solar _____ generate heat from the sun into electricity.
  6. 6. Solar panels would be pointless if _____ were always covering the sun.
  7. 8. About 20% of the land in the U.S.A is used for _____.
  8. 9. For biomass energy, you can burn matter such as _____ scraps.
  9. 10. When nitrogen compounds react with sunlight, _____ is formed.
  10. 12. Mineral _____ are mined from the land.
  11. 15. Is when an atom splits, releasing energy.
  12. 17. This energy comes from the sun.