Science Review Crossword Puzzle

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Across
  1. 4. Release of harmful materials into the environment
  2. 7. Cell organelle that stores materials such as water, salts, proteins, and carbohydrates
  3. 10. An organelle found in plant and algae cells where photosynthesis occurs
  4. 13. A dark cloud whose name means rain
  5. 14. rising warm air that usually bring stormy weather
  6. 16. The amount of water vapor in the air
  7. 17. sinking cool air that usually bring fair weather
  8. 18. Clouds that form in flat layers and often cover much of the sky.
  9. 19. quality The condition of the air based on the amount of pollution in it
Down
  1. 1. The transfer of heat by the movement of a fluid or gas
  2. 2. A rigid structure that surrounds the cell membrane and provides support to the cell
  3. 3. Puffy clouds
  4. 5. A cell structure that controls which substances can enter or leave the cell.
  5. 6. Control center of the cell
  6. 8. cold air moves in under a warm air mass
  7. 9. Wispy, feathery clouds made of ice crystals that form at high levels.
  8. 11. A large body of air that has the same temperature and moisture level throughout
  9. 12. the condition of earth's atmosphere
  10. 15. warm air mass meets and replaces an existing cool air mass causing steady rain
  11. 19. The pre-fix for mid-level clouds