Earth and Space Unit Review

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Across
  1. 5. an imaginary line through Earth from the North Pole to the South Pole
  2. 6. the dropping off of eroded soil and bits of rock
  3. 10. slow process that breaks rocks and other Earth materials into smaller pieces
  4. 11. cannot be replaced by nature easily or quickly
  5. 12. resource something that people use from nature
  6. 13. a mixture of gases found below Earth's surface that is used as fuel
  7. 14. to turn or spin
  8. 16. a large sheet of ice that moves slowly across the land
  9. 17. a liquid that is found beneath Earth's surface that is used to form fuels and to make a variety of other products
  10. 18. a black or brown rock that is found in the earth and burned as fuel
Down
  1. 1. a type of weathering that occurs when water soaks into a material, freezes, expands, and causes the material to split or break apart
  2. 2. a rock that forms when small bits of materials are pressed together in layers
  3. 3. can be replaced by nature easily or quickly
  4. 4. a solid, nonliving substance found in rocks
  5. 7. a rock formed by a volcano or other source of great heat
  6. 8. a rock that was once igneous or sedimentary and changed after being exposed to heat and pressure
  7. 9. the star closest to Earth
  8. 15. the process of wind or water moving small pieces of rock, soil, and sand from one place to another