Science crosswords-3

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Across
  1. 2. Metal used in electrical wiring
  2. 4. Law relating current, voltage and resistance
  3. 5. Scientist who discovered radioactivity in uranium
  4. 6. Scientist who proposed atomic theory
  5. 8. Method of separating salt from seawater
  6. 9. Device used to separate mixtures by spinning
Down
  1. 1. Process of conversion of water vapour into liquid
  2. 2. Gas responsible for greenhouse effect
  3. 3. Radiation used in cancer treatment
  4. 7. Unit of power