Unit 4 Vocabulary Part 1 & Part 2

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Across
  1. 4. something that people need and use.
  2. 6. to make or produce something.
  3. 8. the small parts that make up something bigger.
  4. 13. a mixture of gases that surround the planet.
  5. 15. created by the Earth, not made by humans.
  6. 17. a form of energy that can produce heat, light, and power.
  7. 20. to change something into something else.
  8. 21. the natural things that make up the Earth.
Down
  1. 1. when there is not a lot of something.
  2. 2. a strong power.
  3. 3. something that is happening or being used right now.
  4. 5. something that is ready to take or use.
  5. 7. to move freely.
  6. 9. something that cannot run out.
  7. 10. all the different natural features of a piece of land.
  8. 11. to change something and make it better.
  9. 12. the strength or ability to do something.
  10. 14. to think about how things are connected.
  11. 16. the helpful part of something.
  12. 18. saving or protecting something.
  13. 19. communicating with others in some way.