ESL Blogs

Let me share something about Water....

70% of the Earth's surface is covered with Water...

90% of the Water available in the earth is Salt Water

Salt water is filled with Salt and other Minerals which human can't drink/use directly

Less thank 1% of the water available in the earth can be used by human actually.

2% of the water on earth is Glacier Ice at the North and South Poles.  This ice is fresh water and could be melted; however, it is too far away from where the people live to be usable.

The Egyptians were the first people to record method of treating water.  These records dates back more than 1500 years to 400 AD.  They indicated that most common ways of cleaning water were by boiling it over a fire, heating it in the sun, or by dipping a heated piece of iron into it.  Filtering boiling water through sand and gravel and then allowing it to cool was another common treatment method.

molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. That's why water is sometimes referred to as H₂O. A single drop of water contains billions of water molecules.

Pure water is tasteless, odorless, and colorless.

Water on earth today has been here for millions of years. Because of the water cycle, water moves from the earth to the air to the earth again. It changes from solid to liquid to gas, over and over again.

Fun facts

• Without water, the earth would look like the moon.
• All living things need water to live. People can live several weeks without food, but only a few days without water. We should drink six to eight glasses of water each day!
• Water makes up 83% of our blood, 70% of our brain, and 90% of our lungs. Overall, our bodies are 70% water.

A tomato is about 95% water. An apple, a pineapple, and an ear of corn are each 80% water.