Monday 29 August 2011

Why doesn't fresh water run out?



People use so much fresh water each day such as take a bath, clean food and washing dishes. you might wonder why it doesn't run out. Fresh water doesn't run out because it is constantly renewed by the water cycle. let see how was the water cycle work?

WATER CYCLE
1. The main source of water in the water cycle is the oceans. Every day trillions of liters of water evaporate from the oceans.

2.Water also evaporates from rivers, lakes, and other resources on land. Plants give off water vapor as well.

3.Water vapor in the air cools and condenses. Bunches of tiny droplets collect into clouds.

4.Water from clouds falls back to Earth's surface as precipitation. Rain and snow are the main sources of fresh water on land.

5.When water reaches the ground, three things happen to it. Some water seeps into the ground. Some runs downhill over the surface. Some evaporates back into the air.

There are all about water cycle !
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6 comments:

  1. Create A Country 829 August 2011 at 18:17

    good writing and good grammar!

    ReplyDelete
  2. Create A Country 829 August 2011 at 18:18

    oh that's why we used lt it lots of water but it still have so amazing!

    ReplyDelete
  3. Create A Country 829 August 2011 at 18:18

    chungeng now you look really like scientist boy! haha!

    ReplyDelete
  4. Create A Country 829 August 2011 at 18:19

    now i knew already where does fresh water come from? thanks fri

    ReplyDelete
  5. Create A Country 829 August 2011 at 18:20

    your're welcome! you will get 100 points if teacher ask you about this.

    ReplyDelete
  6. Groundwater Testing13 July 2012 at 14:50

    I wanted a perfect pool chemistry for my home pool. I visited my friend and he suggest me some good tips or keeping water at perfect level as he is an expert at local water testing community. I want to share theses suggestion with those who willing to keep things in level. You pool should have proper level of these parameters, chlorine, chloramines, pH, alkalinity, calcium hardness, cyanuric acid. A pool chlorine is the sanitizer and should be kept between 1.5-3.5ppm. Your pH should be between 7.6-7.8, not 7.2. You will use too much pool acid to keep it at that level. Total pool alkalinity (TA) is between 80-100, calcium hardness between 150-250, and cyanuric acid between 20-40ppm. I am not an expert just telling average values. For more details visit your local water expert’s team.

    ReplyDelete

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