Across
- 2. Substances inside a confined amount of liquid, gas, or solid, which differ from the chemical composition of the material or compound
- 5. The limit the amount of water that a person can use
- 6. Something that occurs when there is a shortage of water to meet the needs of the people
- 8. The process where the water is disinfected using ultraviolet radition
- 9. Something that is produced when impurities are removed from waste water through a treatment process
- 10. The process of forcing water through a special membrane to remove very samll particles ,such as bacteria and dissolved salts,from water
- 11. An important resource and if we do not have it,it will cause a negative impact on us
- 12. Water that can be recycled
- 14. The process of filtering water to remove larger sized particles and bacteria from the water
- 16. A natural or artificial lake, storage pond or impoundment from a dam which is used to store water
- 17. The process of water filtration used in desalination where water is boiled and the water vapour is collected and condensed into freshwater
- 18. Being in a weak or unfavourable position
- 19. Change course
Down
- 1. The process of converting sea water into fresh water by removing salt from the sea water
- 3. An agreement between two or more countries regarding a specific issue over a period of time
- 4. The careful use of resources to ensure that wastage is kept to a minimum
- 7. The knowledge ,skills and tools that people use to meet their needs
- 9. The contamination of water bodies (e.g. lakes, rivers, oceans, aquifers and groundwater)
- 13. The gas phase of water
- 15. An area over which rain falls and is collected.This area may be a forest surrounding a reservoir