Hazourdous earth revision crossword

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Across
  1. 3. these plates move apart
  2. 4. when two plates slide past each other and cause vibrations
  3. 7. the earth is surrounded by it
  4. 9. these plates push into each other and one goes under the other
  5. 10. who discovered the continental drift?
Down
  1. 1. what was Earth previously named?
  2. 2. this plate boundary is named after a political UK party
  3. 5. these plates crash into each other forming a mountain
  4. 6. its the first part of the title
  5. 8. first of five layers of the Earth?