Review

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Across
  1. 5. crack in Earth's crust
  2. 6. are rivers, lakes and glaciers
  3. 7. tectonics, is the theory that Earth's crust is made of moving plates
  4. 8. is the layer below the crust
Down
  1. 1. is an opening in Earth's crust
  2. 2. is the center part of the Earth
  3. 3. rocky layer of Earth's surface
  4. 4. are the gases around the Earth
  5. 6. spot, a fixed pool of magma