Air

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Across
  1. 3. Everything around us, like the air, water, and trees.
  2. 4. What makes plants green and helps them make food.
  3. 5. Dirty things that can harm the air, water, or land.
  4. 7. A liquid that turns cloudy when carbon dioxide is added.
  5. 9. Something we breathe in to stay alive.
  6. 10. How plants make food using sunlight.
  7. 12. A tool to put out fires.
Down
  1. 1. Tubes in our lungs that carry air.
  2. 2. A gas we breathe out, and plants use it to make food.
  3. 5. The force that pushes on things.
  4. 6. A gas in the air that plants need to grow.
  5. 7. Parts of our body that help us breathe.
  6. 8. System: The parts of our body that help us breathe.
  7. 11. The tube in our throat that helps us breathe.