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Published byEileen Harper Modified over 9 years ago
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Essential Question What’s so great about water?
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Properties of Water Single most abundant compound in most living things. Water expands as it freezes = meaning ice is less dense then liquid water. Page 40
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Polarity of water 8 protons in nucleus of oxygen 1 proton in nucleus of hydrogen Molecule has a bent shape Oxygen end of molecule Has a slight negative Charge Polar molecule = because there is an uneven distribution of electrons between the oxygen and hydrogn atoms. Page 40
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Water Attraction between the hydrogen atom on one water molecule and the oxygen atom on another=Hydrogen Bond Water is extremely cohesive -> molecules on surface draw inward allowing drops on smooth surface to form a bead
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Water Water has adhesion easily seen when measuring volume in a graduated cylinder. Page 41
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Solutions Solutions=> ALL components are evenly distributed throughout the solution. Page 42
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Solute Substance that is dissolved
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Solvent Water The substance in which the solute dissolves
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Suspension Mixture of water and nondissolved material Blood in HUMAN body is mostly water which contains many dissolved compounds
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Water is for life: Every HUMAN body cell needs water because many of the body’s processes, including chemical reactions, take place in water.
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What happens to life when the drinking water is unclean?
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Water in plant life: Tracheids-plant cells that transport water within plant. Connected end-to- end like a straw. Xylem-transport subsytem that carries water upward from roots to parts of plant Phloem-second transport subsystem transporting solutions of nutrients and carbs produced during photosynthesis. Page 560
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Transpiration
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