Water Properties


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Properties of Wate
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The properties of water are based on the types of chemical bonds that exist at a molecular level for water.
The atomic structure of a polar molecule such as water (the oxygen side is slightly negative and the hydrogen side is slightly positive) allow the molecules to stick to itself (cohesion) and other  surfaces (adhesion). This property allows capillary action in trees and surface tension for water-striding insects, which allows them to walk on water. The hydrogen bonds of water also allow it to absorb a lot of heat (high specific heat capacity) and this ability to raise or lower temperature slowly allows animals to maintain homeostasis. The final main property, density, affects water since the molecules expand as water freezes and this creates a top-down freezing affect on lakes and ponds---which insulates the lower water and allows fish and aquatic insects to survive winter cold.

The many properties of a water molecule allow living organisms many ways to survive, such as heat regulation and moving nutrients into cells and wastes out of cells. Since we are almost 70-80% water, without water, we would quickly die. The table below gives more information about the importance of water to our existence.

Distribution of Water on Earth

While the Earth is divided into both land and water, our world is about 70% water. This water is distributed unevenly however. Conservation of the remaining drinkable, usable water is quickly becoming a key political issue as many places are polluting and using up what should be a renewable resource---yet the underground stores (aquifers) are being used more quickly than the water cycle can restore it (which can take hundreds of years).


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Christy Croll,
Aug 31, 2015, 11:42 AM
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Christy Croll,
Aug 31, 2015, 9:32 AM
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Christy Croll,
Aug 31, 2015, 9:32 AM
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Christy Croll,
Aug 31, 2015, 9:33 AM
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Christy Croll,
Aug 31, 2015, 9:32 AM
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