Across
- 6. A water particle is 2 hydrogen particles and one...
- 7. Rivers of ice flowing slowly down mountainsides.
- 10. A change of state from gas to liquid.
- 12. Water from precipitation and snowmelt that flows over Earth's surface.
- 14. A method of water treatment for rural homes.
- 15. All changes of state involve the transfer of...
- 17. A change of state from solid to gas.
- 19. Substances that dissolve in water.
- 21. The Sun provides the energy to power the...
- 22. A change of state from gas to solid.
Down
- 1. Permanent ice that covers land.
- 2. Areas of ice at the North and South Poles.
- 3. Ice floats as it is less...
- 4. A change of state from liquid to gas.
- 5. A geological formation of loose rock or soil that is saturated with groundwater.
- 8. "Hard" water has a high [...] content.
- 9. Added in the 'disinfection' stage of the water treatment process.
- 11. A change of state from solid to liquid.
- 13. A change of state from liquid to solid.
- 16. Water in the gaseous state.
- 17. Using water in a way that will make it available for future generations.
- 18. A method of water treatment for use in an emergency.
- 20. Water that falls to Earth's surface.