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The Wonders of Water Interesting Facts about Water • It is the most abundant compound in most living things. • It exists naturally in all 3 states on Earth. Water is less dense as a solid than it is as a liquid. • Because ice is less dense than water, plants and animals can survive in a frozen lake. The Water Molecule A water molecule is made up of one atom of oxygen and 2 atoms of hydrogen. Its chemical formula is H2O Polarity Polarity means that there is an uneven distribution of electrons within a molecule. Water is polar because the electrons spend more time around the Oxygen atom then the Hydrogen atoms. Cohesion • The attraction between molecules of the same substance. Water molecules are attracted to each other because of the molecule’s polarity. An Example of Cohesion Surface Tension Adhesion • The attraction between molecules of different substances. An Example of Adhesion • Capillary action Solutions • A liquid mixture in which all components are evenly distributed. • Solute – The substance that is dissolved. • Solvent – The substance that dissolves another substance. • Water is considered the universal solvent because it can dissolve so many other substances due to its polarity. Water: The Life Giving Substance