Science Crossword Puzzle

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Across
  1. 2. A reaction that releases heat
  2. 3. An image formed where light does not actually reach
  3. 9. Plant tissue that transports food
  4. 11. A substance formed as a result of a chemical reaction
  5. 12. Bending of light as it passes through different mediums
  6. 13. Gradual destruction of materials (usually metals)
  7. 14. A point where light rays meet after reflection or refraction
  8. 15. A slow oxidation reaction of iron with water and oxygen
Down
  1. 1. The breakdown of food into smaller components
  2. 4. The process of releasing energy from food
  3. 5. The functional unit of the kidney
  4. 6. A lens that converges light rays
  5. 7. A substance that takes part in and undergoes change during a reaction
  6. 8. Tiny openings in leaves for gas exchange
  7. 10. A surface that reflects light