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BIO100.02BB - Lesson 02 Molecules of Life 1 Properties and...

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Lesson 02 – Molecules of Life 1) Properties and importance of water 2) Biological molecules a) Carbohydrates b) Lipids c) Proteins d) Nucleic Acids
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Lesson 02 – Molecules of Life Water chemistry http://www.geo.umn.edu/courses/1006/Fall00_night/Water%20molecule.JPG Polarity
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Lesson 02 – Molecules of Life http://picasaweb.google.com/Sayo.Art/NSFArtwork/photo#5083777694499981906 Hydrogen Bonding
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Lesson 02 – Molecules of Life Knowing all this, why is water so cool? It gives water properties that are important for life 1) Cohesion 2) Moderation of temperature 3) Ice Floating 4) Universal Solvent
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Lesson 02 – Molecules of Life Water’s Cohesion Surface tension
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Lesson 02 – Molecules of Life Water Moderates Temperature 1. Absorbs a large amount of heat 2. Evaporative cooling
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Lesson 02 – Molecules of Life Ice Floats A result of molecules expanding rather than contracting when frozen leaving the solid form less dense than the liquid form If ice didn’t float… http://www.gdargaud.net/Climbing/AntarClimb.html http://weathersavvy.com/Q-Winter_WinterFacts.html
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