Crossword puzzle no. 4 on science by Harikesh

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Across
  1. 2. the mirror having reflecting surface curved inside
  2. 3. is the unit of current
  3. 4. after heating the magnesium it forms
  4. 5. bulb is usually filled with
  5. 8. respiratory pigment in human
  6. 9. the enzyme responsible for digestion of proteins in small intestine is
Down
  1. 1. combustion reaction are always
  2. 2. convex lens also known as
  3. 6. nutrition found in fungi
  4. 7. colour of solid magnesium