Water, Air and Human Beings

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 3. A visible suspension in the air of particles of some substance (5)
  2. 5. Any of a group of green pigments found in photosynthetic organisms (11)
  3. 7. A small hard fruit (4)
  4. 11. How plants make food from sunlight (14)
  5. 12. Clear liquid we drink that falls as rain (5)
  6. 13. A mechanical device in a camera that controls size of aperture of the lens (9)
  7. 14. A slender or elongated structure that supports a plant or fungus or a plant part or plant organ (4)

Down

  1. 1. The usually underground organ that lacks buds or leaves or nodes (4)
  2. 2. To cause to grow or sprout (9)
  3. 4. The quantity of water falling to earth at a specific place within a specified period of time (13)
  4. 5. A heavy odorless colorless gas formed during respiration and by the decomposition of organic (13)
  5. 6. The main organ of photosynthesis and transpiration in higher plants (4)
  6. 7. The rays of the sun (8)
  7. 8. One of the tubules forming the respiratory system of most insects and many arachnids (7)
  8. 9. Either of two saclike respiratory organs in the chest of vertebrates (plural) (5)
  9. 10. A plant cultivated for its blooms or blossoms (6)