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Learning Targets “I Can…” -Draw a water molecule and label the atoms and their partial charges. -Distinguish between adhesion and cohesion. -Define “polarity.” -Observe that molecules are in a constant state of motion because they have energy.
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CHEMISTRY A Brief Summary
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All living things are composed of chemicals. What makes up chemicals? 1. Atoms a. Protons (+) b. Neutrons (Neutral) c. Electrons (-) d. Both protons and neutrons are found in the nucleus. The number of protons is the atomic number.
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All living things are composed of chemicals. What makes up chemicals? 2. Elements: substance that contains one kind of atom Important elements in biology... C H O P K N S Ca Fe Mg
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All living things are composed of chemicals. What makes up chemicals? 3. Molecules: chemical units resulting from the combination of elements
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What do cells need to survive? 1. Inorganic chemicals; the most important is WATER! a. Water is found in our cells and surrounding our cells.
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What do cells need to survive? 1. Inorganic chemicals; the most important is WATER! b. Water is polar because atoms are shared unevenly.polar
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What do cells need to survive? c. Water forms hydrogen bonds
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What do cells need to survive? d. Polar molecules are attracted to other polar molecules
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What do cells need to survive?
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2. Organic chemicals a. All contain carbon What do cells need to survive?
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b. They are also called macromolecules because they are so large. i. Carbohydrates (polar) ii. Lipids (nonpolar) iii. Proteins iv. Nucleic Acids
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References http://www.sp.uconn.edu/~terry/images/mo ls/atomfig5.htmlhttp://www.sp.uconn.edu/~terry/images/mo ls/atomfig5.html http://encarta.msn.com/media_461556496 _761567432_-1_1/water_molecule.htmlhttp://encarta.msn.com/media_461556496 _761567432_-1_1/water_molecule.html http://www.youtube.com/watch?v=CT4pU RpXkbYhttp://www.youtube.com/watch?v=CT4pU RpXkbY
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