Air

12345678910111213141516
Across
  1. 4. There is 78% of this in air
  2. 5. Plants use this for photosynthesis
  3. 7. Without air there is no ......
  4. 9. Air carries this and it makes you sneeze
  5. 10. You can't see air, so it is ......
  6. 12. There is no air here
  7. 15. Air protects the earth like one of these
  8. 16. Air is this in a ball or tyre
Down
  1. 1. Humans, plants and animals breathe this
  2. 2. When air is this, it expands and goes up
  3. 3. There is a small quanity of this in air
  4. 6. The gas humans, plants and animals breathe
  5. 7. Air fills everywhere and can change .....
  6. 8. This is moving air
  7. 11. The atmosphere has different ones
  8. 13. Air can push and exert ....
  9. 14. Air has a weight or .......