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21 Cards in this Set
- Front
- Back
Matter
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"stuff" which the universe is composed of
-has mass -occupies space |
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Atoms
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tiny particles that matter is composed of
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Compounds
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substances made by bonding atoms together in specific ways
ex. Carbon Dioxide |
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Molecule
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made up of atoms that are "stuck" together
ex. glass of water |
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Elements
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substances that contain only one type of atom and can't be broken down
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Solid
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rigid, fixed shape and volume
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Liquid
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definite volume and takes shape of container
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Gas
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no fixed shape or volume
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Physical Properties
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characteristic of substance that can change without the substance becoming a different substance
ex. odor, color, volume, state, boiling point, etc. |
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Chemical Properties
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the ability of a substance to change to a different substance
ex. flammability |
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Physical Changes
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changes that do not affect the composition of the substance
ex. melting ice, rubber being stretched |
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Chemical Changes
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changes in the fundamental composition of the substance
ex. hydrofluoric acid attacks glass and is used to etch calibration marks on glass utensils |
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Reactions
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Chemical changes
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Mixture
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something with variable composition
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Alloys
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Mixtures of metals
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Pure Substance
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elements or compounds, always has the same composition;
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Homogeneous Mixture
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same throughout; all regions of resulting mixture have same properties
ex. salt water |
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Solution
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homogeneous mixture
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Heterogeneous Mixture
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regions with different properties from those of other regions
ex. italian dressing, oil and vinegar, sand water |
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Distillation
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a method for separating the components of a liquid mixture that depends on differences in the ease of vaporization of components
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Filtration
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Method for separating the components of a mixture containing a solid and liquid
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