Across
- 1. What natural process fills lakes and rivers?
- 4. What word describes clean water and hygiene?
- 5. What is the main source of freshwater?
- 6. Which element, along with oxygen, makes up water?
- 8. What covers 70% of the Earth’s surface?
- 9. What process makes dirty water clean?
- 10. Where is most of the Earth's freshwater stored?
Down
- 2. What is the Latin word for water?
- 3. What is the process of water turning into vapor?
- 7. What do we call water stored underground?