Crossword puzzle no. 7 on science by Harikesh

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Across
  1. 2. the addition of oxygen to a substance is called
  2. 6. the element used almost exclusive for filaments of incandescent lamps
  3. 7. reaction takes place when electricity is passed
  4. 8. the reaction in which the energy is given out
  5. 9. power of convex lens is
  6. 10. measures blood pressure
Down
  1. 1. heat is evolved during reaction
  2. 3. the image which can be obtained on screen
  3. 4. magnification of plane mirror
  4. 5. amoeba uses for digestion