Rachel and Joanne's heat and light crossword

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Across
  1. 2. An object that releases or emits light is...
  2. 3. lens that curves inwards
  3. 4. What light does when it hits a mirror
  4. 5. Instrument used to measure temperature
  5. 8. Heat transfer through a liquid or a gas
  6. 9. Rays of light do cross when producing this imaging
  7. 11. Rays of light do not cross when producing this type of image(7,5)
  8. 12. Substance that allows heat to flow
  9. 14. lens that bulges out wards
  10. 15. The part of the eye where an image forms
Down
  1. 1. Light is a form of energy called _________ radiation
  2. 6. A measure of how easily light passes through a material is called its ____ index
  3. 7. Bending if light
  4. 10. Heat transfer can occur through a vacuum
  5. 13. Energy that enables us to see