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25 Cards in this Set
- Front
- Back
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Atoms: |
The basic particle of which all elements are made |
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Molecule: |
Two or more atoms held together in a chemical bond |
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Element: |
A pure substance that ha specific physical and chemical properties (ex: copper, aluminum, oxygen) |
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Compound: |
A puts substance made of 2 or more elements chemically combined in a set ratio. It is represented by a chemical formula (ex: water H2O, salt NaCL) |
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Mixture: |
Two or more substances in the same place, but not chemically bound |
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Homogenous Mixture: |
A mixture of substances so evenly mixed that you can NOT see the different parts (ex: chocolate milk) |
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Heterogeneous Muxture: |
A mixture of substances in which you can see individual parts (ex: granola) |
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Density: |
The mass of a material in a given volume |
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The equation for finding density: |
Density = Mass/Volume |
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Mass: |
The measurement of the amount of matter in an object (does not vary with location) |
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Volume: |
The amount of space that matter occupies |
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Weight: |
A measure of the force of gravity on an object (varies with location) |
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Conservation of Mass: |
Matter is never created or destroyed in any chemical or physical change |
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Matter: |
All of this has volume and mass. It can be weighed, and takes up space |
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Name 1 type of physical change: |
Change of state |
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Example of a change of state: |
Bose-Einstein condensate to solid to liquid to gas to plasma |
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Name 1 type of physical change:
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Change in form |
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Example of a change in form: |
Breaking, crushing, chopping, filtering |
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Chemical change: |
Produces one or more new substances |
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Temperature: |
The measure of the average energy of random particles of matter |
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Thermal Energy: |
The total energy of all the particles in an object, This energy ALWAYS flows from warmer to cooler matter |
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Chemical Energy: |
Potential energy stored in the chemical bonds of atoms |
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Endothermic Change: |
Energy is taken IN (this feels cold) |
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Exothermic Change: |
Energy is RELEASED (this feels hot) |
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Every chemical or physical change includes... |
A change in energy! |
