Across
- 2. the process of learning
- 4. grow the increase in the amount of people
- 5. rate number of babies born per 1000 peop.
- 9. something that can´t be replaced
- 11. car that uses electricity to run
- 12. using a resource
- 13. resources materials found in nature
- 15. a fossil fuel that powers cars
- 16. the amount of a resource
- 18. water found in rocks underground
- 19. ores rocks that contain usuful metals
Down
- 1. methods used to give people clean water
- 3. things people trhow out, trash
- 5. fuel natural gas, petroleum, and coal
- 6. the upper layer of the earth
- 7. substance used for trating diseases
- 8. something that can be easily replaced
- 10. rate number of people died per 1000 people
- 14. too many people in a place
- 17. parts of the earth where humans live