Newspaper crossword

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Across
  1. 3. needed
  2. 5. floor on the bottom of the sea
  3. 7. when two plates rip apart
  4. 11. what may happen after an earthquake
Down
  1. 1. coldest season
  2. 2. not safe
  3. 4. land in the middle of the sea
  4. 6. when the earth shakes
  5. 8. mountain full of magma
  6. 9. shifting things under the earth crust
  7. 10. a low part in the ocean
  8. 12. bad weather