Across
- 2. O in H2O stands for _____.
- 3. One method early people used for treating water.
- 5. Earth would look like this without water.
- 8. What percent of our blood is water?
- 9. H2O in water form is a _____.
- 12. A chemical that is used to treat water.
- 13. Liquid H2O becoming a gas.
- 14. The amount of molecules in a single drop of water.
Down
- 1. Rain, snow, sleet, and hail.
- 4. H2O in ice is a _____.
- 6. The first people to record treating water.
- 7. First country to use chlorine to treat water.
- 10. Supplies springs and wells.
- 11. H2O in steam is in _____ form.