ES Extra Credit Crossword 4/22

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Across
  1. 10. Nuclear _______ is the process in which heavy nuclei are broken down to create a large amount of energy.
  2. 11. A _________ resource is a natural resource that can be replaced by nature in a short period of time.
  3. 13. When renewable resources are replaced at the same rate at which they're being used, it's called ___________ yield.
  4. 15. _______ fuels are fuels derived from living things.
  5. 16. __________ energy is energy produced by naturally-occurring heat/steam/hot water.
  6. 18. _____________ power is power generated by converting the energy of moving/falling water into electricity.
  7. 19. Molecules (chemicals) with only hydrogen and carbon bonds, which are found in plant materials (which is why they burn easily).
  8. 20. A substance that enters Earth's geochemical cycles and can harm the well-being of living things.
Down
  1. 1. A ____________ resource is a resource that exists in a fixed amount and an only be replaced by processes that take millions of years.
  2. 2. ________ bonds are a chemical attraction that forms between water molecules. They're responsible for many of the properties of water.
  3. 3. Sand, gravel, and crushed stone that naturally accumulate on or near the Earth's surface.
  4. 4. Resources that the Earth provides are called _______ resources.
  5. 5. Nitrogen-______ bacteria are bacteria that can capture nitrogen from the air and convert it into a more useful form.
  6. 6. ______ fuels are energy sources that formed over geologic time as a result of the compression and decomposition of organic matter.
  7. 7. A ____________ cell is a structure made of silicon that converts solar energy into electricity.
  8. 8. The process of removing salt from seawater to produce fresh water.
  9. 9. The process where "productive land" (where farming could occur) turns into a desert.
  10. 10. Materials that are consumed to produce energy.
  11. 12. Plant material compressed by water and sediment, which is highly flammable and can become coal if further compressed.
  12. 14. Solid, unweathered rock found below layers of soil and aggregate.
  13. 17. A natural resource that can be mined for profit.