Science mashup

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Across
  1. 2. sound travels as ________ waves.
  2. 5. we draw forces using them
  3. 6. partial shadow
  4. 8. type of indicator
  5. 9. A number of forces acting on an object may be replacedby a single force that has the same effect as all original forces acting together. This single force is called a ______ force.
  6. 10. shape of the earth
  7. 12. copper oxide+sulfuric acid produces water and ______.
Down
  1. 1. K
  2. 3. full shadow
  3. 4. separates large insoluble solids from a liquid
  4. 7. liquid that passes though a filter
  5. 11. outer white layer of the tooth which is a calcium phosphate mineral