layers of the earth

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Across
  1. 4. the magma that flows from an opening onto the surface of the earth
  2. 5. small bits of weathered rock
  3. 7. the thin outer layer of the earth which seems to be made of many pieces
  4. 9. refers to particles that were once part of a living thing
  5. 11. the middle layer of the earth which makes up the most of the earth's mass
  6. 12. the loose material on the surface of the earth in which plants might grow
Down
  1. 1. a scientist who studies the nonliving parts of the earth
  2. 2. hot melted rock under the surface of the earth
  3. 3. the wearing away and breaking down of rocks
  4. 6. the movement of sediment from one place to another
  5. 8. the center of the earth
  6. 10. the event that caused the entire crust of the earth to change