scientific words

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Across
  1. 2. a natural disaster that shakes the earth
  2. 4. a planet that we live on
  3. 5. a body-system that help you to move
  4. 6. a huge wave that may damage everything
  5. 8. is needed to work all appliances
  6. 9. is needed to do work
Down
  1. 1. a a place whereas an organism live
  2. 3. something we take when we are ill
  3. 7. a state of matter that is very hard