Earth's system vocab

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Across
  1. 3. appears twisted.
  2. 4. appears layered.
  3. 7. the remains of plants and animals.
  4. 9. travels faster than s waves
  5. 11. study of Earth.
  6. 12. heat,pressure,cooling,melting are all part of.
Down
  1. 1. No longer in existence.
  2. 2. group of animals that occupy a certain area.
  3. 3. a solid inorganic material found in nature.
  4. 5. study of earthquakes
  5. 6. water held underground.
  6. 8. still in existence,surviving species.
  7. 10. appears glassy.