Earth's spheres and layers

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Across
  1. 7. How hot or cold something is.
  2. 8. All living things on Earth.
  3. 10. All water on Earth.
  4. 11. The thin, rocky outer layer where we live.
  5. 13. The thickest layer; hot, soft rock that moves slowly.
Down
  1. 1. The layers of gases surrounding Earth.
  2. 2. A force that pushes inward because of the weight above.
  3. 3. All solid parts of Earth.
  4. 4. A section or part of the Earth.
  5. 5. A solid ball of metal; the hottest, deepest layer.
  6. 6. A layer of liquid metal (iron and nickel) that flows.
  7. 9. When two spheres affect each other.
  8. 12. Parts that work together as a whole.