Water Resources
Across
- 1. In Africa, the frequent lack of rain has led to insufficient water supply for ________.
- 3. A __________ area refers to an area over which rain falls and is collected.
- 6. An International _________ on water is an arrangement between two or more countries regarding the supply and use of water resources over a specific period of time.
- 7. NEWater is piped into the reservoirs before the water is ___-_______ to homes, factories and schools.
- 8. The process of water filtration used in desalination where water is boiled and the water vapour is collected and condensed into fresh water.
- 12. Some fresh water can also be found deep underground and is also known as __________.
- 13. The process of filtering water to remove larger sized particles and bacteria from the water.
- 15. Recycled water or water __________ is produced when impurities are removed from waste water through a treatment process.
- 16. Reverse __________ is the process of forcing water through a special membrane to remove very small particles such as bacteria and dissolved salts, from water.
- 17. Much of the world's water supply is also used in __________ and in agriculture.
- 18. The knowledge, skills and tools that people use to meet their needs.
Down
- 1. Rainwater is _________ by the trees and plants and is then absorbed by the soil layers on the ground.
- 2. The use of advanced __________ technology has made it possible to further treat used water to produce a very high grade water known as NEWater.
- 4. Fresh water are increasingly __________ by human activities.
- 5. PUB set up mobile exhibitions and the use of _____-_____ devices.
- 8. The process of converting sea water into fresh water by removing salt from the sea water.
- 9. Being weak or unfavorable position.
- 10. Water __________ occurs when there is shortage of water to meet the needs of people.
- 11. The treated water is suppiled to households for __________.
- 14. The careful use of resources to ensure that wastage is kept to a minimum.