Zusammenfassung der Ressource
Water
- Water Cycle
- Evaporation
- Condensation
- Percipitation
- Seeping
- Flows back to sea
- Water Treatment
- 1.Screening
- 2.Settling
- 3.Filtration
- 4.Chlorination
- 5.Fluoridation
- Hardness
- Hard Water is water that doesn't easily form a lather with soap
- Soft water is water that easily forms a lather
- Hardness is caused by calcium ions