biology campbell reece exam
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Properties of water
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AP Biology Campbell/Reece 8e Chapter 3 Notes
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Chapter 3 – Water and the Fitness of the Environment
3.1 – The polarity of water molecules results in hydrogen bonding
• Polar molecule – two ends of the molecule have opposite charges
• Oxygen: δ-
• Hydrogen: δ+
• Positive hydrogen of one molecule is attracted to negative oxygen of another in a hydrogen bond
3.2 – Four emergent properties of water contribute to Earth’s fitness for life
• Four properties: cohesive behavior, ability to moderate temperature, expansion upon freezing, versatility as a solvent
• Cohesion – the bonding of similar molecules through hydrogen bonds
• Adhesion – the clinging of one substance to another
• Surface tension – a measure of how difficult it is to stretch or break the surface of a liquid
• Kinetic energy – energy of motion
Chemistry Review
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Produced: Mastah E Chemistry Review Sheet 1 ? Chemistry is the study of matter and the changes it undergoes. ? A chemical is any substance that has a definite composition. This means it is always made of the same stuff no matter where the chemical comes form. Chemicals can exist naturally or be made. ? A chemical reaction is the process of which one or more substances are changed to produce one or more different substances. ? The recant is a substance or molecule that participates in a chemical reaction. When written in an equation, the reactants are on the left hand side ? Products are the substances produced from chemical reactions and are on the right hand side of the arrow in equations.
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