science vocabulary

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Across
  1. 4. It occurs when certain chemicals are brought together.
  2. 5. A source of salt.
  3. 6. An oxide of iron produced by the action of water.
  4. 7. A unit of electrical resistance.
  5. 9. A common heavy metal
  6. 11. Very small unit of living matter.
  7. 13. Functional part of a living body
  8. 14. Energy, force
  9. 16. Liquid necessary for most forms of life.
  10. 18. Men whose field of work is physics.
Down
  1. 1. Unit of electrical power.
  2. 2. Scientific work in new fields.
  3. 3. Carbon monoxide.
  4. 8. The profession in which we find doctors and nurses, and adjective.
  5. 9. Where many scientists do their work.
  6. 10. Do this to extinguish a candle or a small flame
  7. 12. A new exercise carried out by a scientist.
  8. 15. Without it, things remain theories.
  9. 16. Unwanted matter.
  10. 17. Mr. Nobel created one for physics.