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) is a transparent, tasteless, odorless, and almost colorless chemical substance and covers over 70% of Earth's surface. It may be rain (liquid) if warm, or it may be frozen if cold.If water gets very cold (below 0 °C (32 °F)), it freezes and becomes ice, the frozen variant of water.In a water molecule, two hydrogen atoms are joined to an oxygen atom by covalent bonds. The oxygen nucleus attracts the electrons more than the hydrogen nuclei do.
The dihydrogen monoxide parody involves calling water by the unfamiliar chemical name "dihydrogen monoxide" (DHMO) and listing some of its harmful effects in an alarming way.
Some examples include talking about how "it causes burning, suffocation and corrosion," when it's actually just talking about hot water, drowning and rust.
A few desert animals can get enough water from their food, but the others must drink.
Water has no smell,taste or color Water is also used for recreational purposes, see list of water sports.
Things having something to do with water may have "hydro" or "aqua" in their name, such as hydropower or aquarium, from the Greek and Latin names for water.
It is also called the universal solvent, because it dissolves many things.
The water in oceans is salt water, but lakes and rivers usually have unsalted water.
Only about 3% of all the water on earth is fresh water. Many places, including cities and deserts, don't have as much water as people want. Though people can survive a few months without food, they can only survive for a day or two without water.
Water is used as both the coolant and the neutron moderator in most nuclear reactors.
This may be ordinary water (called light water in the nuclear industry) or heavy water.