Science quiz

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Across
  1. 5. Lens used to treat myopia
  2. 7. chemical reaction in which heat is released to the surrounding
  3. 8. acid present in lemon
  4. 9. isotope of ___ is used in cancer treatment
  5. 10. Property of soil to transmit water and air
Down
  1. 1. removal of hydrogen from a substance
  2. 2. Color of blood in spiders
  3. 3. unit of electric current
  4. 4. speed of light is minimum in
  5. 6. addition of hydrogen in a substance in a reaction