Ozone Crossword

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Across
  1. 1. The air surrounding Earth
  2. 4. The lowest layer of Earth’s atmosphere
  3. 6. The chemical formula for ozone
  4. 7. A gas that makes up most of Earth’s atmosphere
  5. 11. Able to react violently or burst when concentrated
  6. 12. A mixture of gases that surrounds Earth
  7. 15. Found or noticed, even in small amounts
  8. 16. The measure of how much of something is present
  9. 17. The outer layer of Earth where we live
  10. 19. A way to describe parts of a whole out of 100
  11. 20. The “ozone ______” is found in the stratosphere
Down
  1. 2. The region where most ozone is found
  2. 3. The process of cleaning air or water
  3. 5. Materials used to make clothing that can be bleached with ozone
  4. 8. A group of atoms bonded together
  5. 9. A gas made of three oxygen atoms
  6. 10. Harmful substances that increase ozone near the ground
  7. 13. Relating to factories and large-scale production
  8. 14. A gas that makes up much of the air and forms ozone
  9. 16. The height above Earth’s surface
  10. 18. A strong smell that ozone has