Did You Know?
- Water is made up of two elements, hydrogen and oxygen. Its chemical formula is H2O.
- Each molecule of water is made up of two hydrogen atoms bonded to a single oxygen atom.
- The existence of water is essential for life on Earth.
- Water has three different states, liquid, solid and gas.
- The word water usually refers to water in its liquid state. The solid state of water is known as ice while the gas state of water is known as steam or water vapor.
- Water covers around 70% of the Earth’s surface.
- The three largest oceans on Earth are the Pacific Ocean (largest), the Atlantic Ocean (second largest) and the Indian Ocean (third largest)..
- Water from a sea or ocean is known as seawater. On average, every kilogram (2.2lb) of seawater contains around 35 grams (1.2 oz) of dissolved salt.
- Pure water has no smell and no taste, it also has a pH level around 7.
- An important use for water is in agricultural irrigation, this is when water is artificially added to soil in order to assist the growth of crops.
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