essential question what’s so great about water?. properties of water single most abundant compound...
TRANSCRIPT
Essential Question
What’s so great about water?
Properties of Water
• Single most abundant compound in most living things.
• Water expands as it freezes = meaning ice is less dense then liquid water.
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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.
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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
Water• Water has
adhesion easily seen when measuring volume in a graduated cylinder.
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Solutions
Solutions=> ALL components are evenly distributed throughout the solution.
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SoluteSubstance that
is dissolved
Solvent
Water
The substance in which the solute dissolves
Suspension• Mixture of
water and nondissolved material
• Blood in HUMAN body is mostly water which contains many dissolved compounds
Water is for life:
Every HUMAN body cell needs water because many of the body’s processes,
including chemical reactions, take place in water.
What happens to life when the drinking water is unclean?
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.
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Transpiration
