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22 Cards in this Set
- Front
- Back
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What is the basis of physiology
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Molecular interactions - These are based on chemistry
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Matter
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Anything that occupies space and has weight
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States of matter
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Solid, Liquid, Gas
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Solids
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Definite shape
Definite Volume Can not be poured May have high or low density |
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Liquids
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No definite shape
Definite volume Can be poured May have a high or low density |
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Gases
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No definite shape
No definite volume- takes the shape of the container May be poured Have a low density |
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Changes of State
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Adding or removing energy can make matter change state
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Adding energy to matter
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Solid to liquid to gas
Heating Curve |
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Removing energy from matter
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Gas to liquid to solid
Cooling Curve |
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Physical Changes
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When a substance changes state without a new substance being produced
Ex: Ice to water |
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Chemical changes
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New substances are produced which have different properties than the original substance
Ex: Burning paper; iron rusting |
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Decrease temperature
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Increase density
Molecules move closer together Rigid lattice Polar molecule |
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Formula for density
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D = M/V
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Increase Concentration
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Increase density
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Decrease concentration
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Decrease Density - because molecules spread out
Ex: 100 pennies in a container vs. 5 pennies that are spread out |
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Weight
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Mass affected by gravity; weight changes with gravity
Mass doesn't change |
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Composition of matter
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Mixtures
Compounds Elements |
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Elements
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Substance that can not be broken down into simpler substance by ordinary chemical means
Characterized by size Hydrogen is the smallest |
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Compounds
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Can be broken down by chemical means
Comprised of 2 or more elements united by ionic or covalent bonds Properties are different than the substances from which they are made |
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Mixtures
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Can be separated by physical means
Homogeneous or heterogeneous |
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Homogeneous
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Everything is the same
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Heterogeneous
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Different throughout
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