why do we have water?

Answer 1

To drink! 80 percent of our body is water and we have to continuosly replenish it.

Water carries our digestion, metabolism and excretes the waste by dissolving it. It keeps us looking beautiful.None of our body parts would function without enough water, why, we would not be even conscious

We would become a 'Mummy' ie mummified if all the water was sucked out of our body

Answer 2

Water H2O is a oxoide of hydrogen. when you burn hydrogen you get carbon dioxide and WATER. i don't how you might burn enough hydrogen to fill an ocean, but there is a lot of hydrogen in the universe and people think, and perhaps have found water ice on other planets. we are just very lucky that earth is that the earth is the right temperature to have so much liquid water.

Answer 3

This should answer in depth all your Qs concerning what the earth is made up of and why

The atmosphere is a mixture of nitrogen, oxygen, and trace gases that include water vapor. The atmosphere has different properties at different elevations.
The solid earth is layered with a lithosphere; hot, convecting mantle; and dense, metallic core.
Land forms are the result of a combination of constructive and destructive forces. Constructive forces include crustal deformation, volcanic eruption, and deposition of sediment, while destructive forces include weathering and erosion.
Water, which covers the majority of the earth's surface, circulates through the crust, oceans, and atmosphere in what is known as the "water cycle." Water evaporates from the earth's surface, rises and cools as it moves to higher elevations, condenses as rain or snow, and falls to the surface where it collects in lakes, oceans, soil, and in rocks underground.

Water is a solvent. As it passes through the water cycle it dissolves minerals and gases and carries them to the oceans.
Living organisms have played many roles in the earth system, including affecting the composition of the atmosphere, producing some types of rocks, and contributing to the weathering of rocks.
The earth processes we see today, including erosion, movement of lithospheric plates, and changes in atmospheric composition, are similar to those that occurred in the past. earth history is also influenced by occasional catastrophes, such as the impact of an asteroid or comet.
Fossils provide important evidence of how life and environmental conditions have changed.
The earth is the third planet from the sun in a system that includes the moon, the sun, eight other planets and their moons, and smaller objects, such as asteroids and comets. The sun, an average star, is the central and largest body in the solar system.
Most objects in the solar system are in regular and predictable motion. Those motions explain such phenomena as the day, the year, phases of the moon, and eclipses.
Gravity is the force that keeps planets in orbit around the sun and governs the rest of the motion in the solar system. Gravity alone holds us to the earth's surface and explains the phenomena of the tides.
The sun is the major source of energy for phenomena on the earth's surface, such as growth of plants, winds, ocean currents, and the water cycle. Seasons result from variations in the amount of the sun's energy hitting the surface, due to the tilt of the earth's rotation on its axis and the length of the day.

List of the layers that makes up earth and atmosphere may also explain

The geosphere (the solid earth, plate tectonics, volcanoes, earthquakes)
The atmosphere (air, weather, climate)
The hydrosphere (water, oceans, rivers)
The cryosphere (ice, glaciers, ice ages)
The biosphere (life, including humanity, fossils, and evolution)
The exosphere (our solar system and space)

Answer 4

because half of our body works on water, and we want to stay clean

Answer 5

as a result of a chemical reaction H2O

Answer 6

for drinking,for bathing,