Across
- 1. a group of people living together or having a similar feature
- 3. the practice and science that's classified in different categories
- 5. the circulation of water
- 7. the process that changes liquid water to water
- 8. a place that grows supplies and goods
- 11. a branch of biology that deals with relations
- 13. water released from clouds in the form of rain
- 15. Harmful materials in our environment
Down
- 2. excessive nutrients in a lake or any body of water
- 4. how technology and trade changed the word
- 6. a social goal for people to exist on earth
- 9. a system in physical change
- 10. cold water rises toward the surface
- 12. a person who buys goods
- 14. a movement caused in a fluid it's less dense