properties of water
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Water..Water..Everywhere...The molecule crucial to all life
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What are the properties of water that make it so crucial to all living things??
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Every cell in your body...is 70-90 percent water...
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Water MoleculesWhat do you observe?
2 HYDROGEN ATOMS
ONE OXYGEN ATOM
ALL HELD TOGETHER BY COVALENT BONDS
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Water has several special properties that make it so important to all living things
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Water is a Polar Molecule
The poles, or ends of the molecule, have weak opposing charges.
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Water’s Polar Nature Causes Cohesion & Adhesion
Cohesion - Similar forces attracted
Adhesion - Opposite forces attracted
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It also makes it a great solventActually, it is the “universal solvent”
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Water has surface tension
Hydrogen bonding and cohesive forces cause water molecules to “stick” to each other
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How does water get from the roots of tall trees like redwoods to the very top leaves?
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Capillary Action
The ability of water to move against the force of gravity, using the properties of adhesion and cohesion
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WHAT DOES THESE TWO IMAGES HAVE TO DO WITH THE PROPERTIES OF WATER?
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Water also has a high specific heat capacity
This means it takes a lot of energy to heat it, or to cool it off
This energy is actually necessary to break the hydrogen bonds
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How does this relate to your body in terms of temperature?