Across
- 3. an element of all living things
- 4. fuel made from dead plants and animals
- 7. everything around us
- 8. spread of communities outside of cities
- 10. change in inherited characteristice over time
- 11. Leslie's middle name
- 12. lack of food water shelter
- 13. animals that eat other animals
- 14. from the sun
- 17. the ability to keep going
- 18. moving to cities
- 19. all the water on the earth
- 20. material and energy needed by humans
Down
- 1. a plant eater
- 2. worldwide
- 5. living things
- 6. the resources an individual uses
- 9. the air around the earth
- 15. movement of water from air to earth
- 16. a warm weather phenomenon