Changing earth

123456789
Across
  1. 3. Outermost shell of a terrestrial planet
  2. 5. Sliding past each other
  3. 6. Plates moving away from each other
  4. 8. Earth's materials are worn away from natural forces
  5. 9. The breaking down of minerals on Earth's surface
Down
  1. 1. Composed of mostly iron and nickel
  2. 2. Sediments added to the Earth's landmass
  3. 3. Two plates moving toward each other
  4. 4. Hot, dense ball (mostly iron)
  5. 7. Mostly-solid bulk of the earth's interior