Science Time

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Across
  1. 2. force that attracts objects towards the earth's centre
  2. 6. materials that completely block the light
  3. 7. the ability to do work
  4. 9. dark spot formed by opaque object
  5. 10. an igneous rock used for polishing teeth
Down
  1. 1. a push or pull acting on an object
  2. 3. a Japanese word meaning 'harbour wave'
  3. 4. the point under the ground where the earthquake begins
  4. 5. molten rock inside the earth
  5. 8. object on which work is to be performed