Ch3Themes - oxygen region of the molecule having a partial...

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Alyssa Miller Alex Bigras-Masse A.P. Biology Chapter 3 Review Identify Examples of the three major themes in A.P. Biology * Science as a Process of Inquiry The structure of Ice ~When ice is put into water, ice has fewer molecules than an equal volume of liquid water; therefore ice is less dense than liquid water. How a crystal of table salt dissolves in water ~ Negative oxygen regions of polar water molecules are attracted to sodium cations. ~ Positive hydrogen regions of water molecules cling to chloride anions ~ Sphere of water molecules, called a hydrogen shell, surrounds each solute ion. * Relationship of structure to function ~ The bonds that hold together the atoms in a water molecule are polar covalent, with the
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Unformatted text preview: oxygen region of the molecule having a partial negative charge and the hydrogen’s having a partial positive charge. The water molecule, shaped like a wide V, is a polar molecule, meaning that opposite ends of the molecule have opposite charges. ~ Hydrogen bonds result in adhesion and cohesion, ability to stabilize temperature, expansion upon freezing, and versatility as a solvent. * Regulation ~ Water stabilizes air temperatures by absorbing heat from air that is warmer and releasing the stored hear of air that is cooler. ~ pH level regulates chemical processes ~ Buffers allow biological fluids to resist changes to their own pH when acids or bases are introduced....
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This note was uploaded on 10/30/2009 for the course SI 0126 taught by Professor Gourney during the Spring '09 term at École Normale Supérieure.

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