Ecology

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Across
  1. 3. A very large area of salty water, like the Atlantic or Pacific.
  2. 7. The star that gives us light and warmth.
  3. 8. The liquid we drink and find in rivers, lakes, and oceans.
  4. 9. To make something less in amount.
  5. 10. Animals and plants that live in nature.
  6. 12. Living creatures, like dogs, cats, birds, fish.
  7. 14. Air that moves.
  8. 15. Large plants with a trunk and branches that produce oxygen.
  9. 17. A large area with many trees.
  10. 19. Turning old things into new things so they can be used again.
  11. 21. The weather in a place over a long time.
  12. 22. The ground where plants grow.
  13. 23. Our planet where we live.
Down
  1. 1. Harmful substances in the air, water, or ground.
  2. 2. To use something again instead of throwing it away.
  3. 4. The gas we breathe.
  4. 5. Water that falls from the sky in drops.
  5. 6. To become bigger or more developed.
  6. 11. Living things that grow in the ground, like flowers, trees, bushes.
  7. 13. Everything around us: trees, animals, mountains, rivers.
  8. 16. Power needed to do things, like light and movement.
  9. 18. Things we throw away because we don't need them anymore.
  10. 20. To look after something or someone; to take care of.
  11. 21. Free from dirt; not dirty.
  12. 22. To protect something so it can be used in the future.