Facts about water

Here are some common and some uncommon facts about water-

  • Water covers 70.9 percent of the planet’s surface.
  • Ninety-seven percent of the water on Earth is salt water and unfit for drinking.
  • 2% of drinkable water is locked in ice caps and glaciers, which means we are left with just 1% of water for all our needs.
  • The water found in the Earth’s lakes, rivers, streams, ponds, swamps, etc. accounts for only 0.3 percent of the world’s fresh water.
  • There is the same amount of water on Earth as there was when the Earth was formed.
  • The biggest property of water is that it is a universal solvent. It can dissolve most of the substances present on earth.
  • Its chemical formula is H2O, meaning that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds.
  • Water is the only natural substance that can exist in all three states of matter – solid, liquid, and gas.
  • Frozen water (ice) is lighter than water in liquid form, which is why ice floats in water.
  • About 70% of the human body is water. If we weigh around 70 kg then the water content in a body will be around 42 litres.
  • The skin is 64% water while muscles and Kidneys have 79% water, 70% human brain is water and our bones contain 31% water.
  • We have 100 trillions of cells in our body and all need water to function.
  • In 24 hours we lose about 240 ml of water while exhaling.
  • Water expands by 9% when it freezes.
  • There is more fresh water in the atmosphere than in all of the rivers on the planet combined.
  • Water is a transparent, tasteless, odourless, and nearly colourless chemical substance,
  • Pure water has a neutral pH of 7, which is neither acidic (less than 7) nor basic (greater than 7).
  • The boiling point of water is 100°C.
  • The freezing point of water is 32 degrees Fahrenheit. This is equal  to 0 degrees Celsius.
  • Water acts as a coolant as it absorbs a lot of heat before it begins to get hot.
  • Sound waves travel several times faster through water than air.
  • Water is a good conductor of electricity. In fact, Sea water is best conductor of electricity as it contains a lot of ions like Na+, OH-, etc .

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