1a) I learnt about how NEWater helps to filter waste water to produce clean water.
1b) What NEWater equipment is used to filter the water.
1c) About the 4 National 'Taps' and the importance of our water.
2) I have learnt two concepts of reverse osmosis and the use of ultraviolet rays.
3) Water molecules are just the right size to pass through the pores of the semi-permeable membrane while the other molecules like the bacteria and virus are too big to pass through them.
4) I can use water used to wash vegetables or rice to water the plants.
Thursday, March 25, 2010
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