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15 Cards in this Set

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  • Back
Physical changes
alters form not idetity (melting ice)
chemical changes
loses identity, forms new substances, burning wood
Mixtures
2 or more substances not in specific proportions mixed togther
Heterogenous
not the same throughout (chocolate chip icecream)
homogenoeous
same throughout (vinalla icecream)
pure substance
one kind of substance, definate properties
elements
cannot be broken down into other substances, unique properties, (carbon (c) nitrogen (N)
compounds
chemical combination of 2 or more elements
atoms
of each element have a unique mass
melting
solid to liquid
freezing
liquid to solid
evaporation
liquid to gas, only on the surface
Vaporization
liquid to gas usually heat added, happens eveywhere in liquid
condensation
vapor to liquid (clouds to rain)
sublimation
solid to gas( dry ice)