HOLIDAY HOMEWORK

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Across
  1. 2. - Inward-curved mirror
  2. 4. - Balloon-like air sacs in the lungs
  3. 6. - Tiny pores on leaf surfaces for gas exchange
  4. 7. - Breakdown of food into simpler substances
  5. 8. - Addition of oxygen or removal of hydrogen
  6. 12. - Bouncing back of light from a surface
  7. 14. - Process of releasing energy from food
  8. 15. - Coating iron with zinc
Down
  1. 1. - Insoluble solid formed in a reaction
  2. 3. - Removal of oxygen or addition of hydrogen
  3. 5. - Process by which green plants make food using sunlight
  4. 9. - Bending of light in another medium
  5. 10. - Reaction of acid and base
  6. 11. - Surface that forms images by reflection
  7. 13. - Distance between pole and focus