Water - Water Water covers approximately 71% of Earth's...

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Water Water covers approximately 71% of Earth's surface. Life evolved in water. Living things are 70- 90% water. In nature, water is a solvent for many kinds of chemical reactions. Water is a polar molecule because the oxygen atom is much more electronegative than the hydrogen atoms, resulting in unequal sharing of electrons. As a result, it forms hydrogen bonds with other polar or charged particles. Cohesion and Adhesion of Water Molecules The hydrogen bonds between adjacent water molecules are very weak. As a result, they form and break rapidly, often lasting only a few trillionths of a second. At any instant in time, a large proportion of water molecules are bonded to nearby water molecules, giving water a cohesive property. Water molecules are also attracted to other polar substances causing them to adhere to many kinds of materials. The meniscus shown below forms when water adheres to the sides of the glass container.
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Water - Water Water covers approximately 71% of Earth's...

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