Unlock 3 Discovery and inventions

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Across
  1. 3. belonging to just one person
  2. 4. very important or necessary
  3. 6. to stop working
  4. 7. without end or restriction
  5. 8. to stop something from happening
  6. 10. made by people, not in nature
Down
  1. 1. a change of position or place
  2. 2. to show the meaning or truth of something more clearly by giving examples
  3. 5. things that are used for a particular activity
  4. 9. able to hurt or damage