Crossword puzzle by Eli

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Across
  1. 3. an economy in which economic decisions are made in markets.
  2. 8. speed in a given direction.
  3. 11. no light let through material.
  4. 12. nearly all light let through.
  5. 13. a bending of light.
  6. 15. Changes on the outside of an organisms.
  7. 16. bouncing of light.
Down
  1. 1. what is the farthest planet to the sun.
  2. 2. the money left over after a business pays all its costs.
  3. 4. some light let through material.
  4. 5. Both organisms benifet off each others actions.
  5. 6. how an organisms has changed to better survive in its enviorment.
  6. 7. what is the closest planet to the sun.
  7. 9. One organisms benifits and one if unaffected
  8. 10. One organisms benefits and one is harmed.
  9. 14. how many planets are there.