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A substance composed of only one type of atom or molecule

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A property that a substance displays without changing its chemical composition
(Think color, temperature, etc.)

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A change that alters only the state or appearance of a substance, but not its chemical composition
(Think melting, changing shape, etc.)

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Anything that occupies space and has mass (remember, a gas both occupies space and has mass!)

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A change that alters the molecular composition of a substance
(Think of ethanol exploding like in the Labster simulation)

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A property that a substance displays only by changing its composition via a chemical change
(Think flammability, corrosiveness, etc.)

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The phase transition from solid to liquid (physical change - opposite of freezing)

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A mixture in which the composition varies from one region to another
(Think chocolate chip cookies)

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A property that is independent of the amount of a given substance
(Think density, boiling point, color, etc.)

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A mixture with the same composition throughout
(Think ocean water, Kool-Aid, etc.)

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A property that depends on the amount of a given substance
(Think mass, length, etc.)

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The phase transition from liquid to gas (physical change)

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The phase transition from solid directly to gas (physical change - rare, but think of dry ice)

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A homogeneous mixture of 2 substances

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The phase transition from liquid to solid (physical change - opposite of melting)

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The phase transition from liquid to gas (opposite of condensation)

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The process by which mixtures of miscible (means they can mix) liquids are separated by heating the mixture to boil off the more volatile liquid. The vaporized component is then recondensed and collected in a separate flask
(Remember our Labster simulation to separate ethanol and water?)

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Abbreviated d, the ratio of an object's mass to its volume; units of g/mL generally
d = m/v

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The phase transition from gas to liquid (opposite of evaporation)

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The temperature at which a liquid goes through the phase transition to a gas

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The thing in an experiment than changes due to the changing of an independent variable
(Think: amount of water evaporation based on the temperature of the room)

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The thing YOU change in an experiment
(Think: the temperature of the room in the water evaporation experiment)

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A highly controlled procedure designed to generate observations that may support a hypothesis or prove it wrong

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Interpretation of your results (is your hypothesis correct, etc.)

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Your data and observations from an experiment

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A proposed explanation for observations and laws, based on well-established and tested hypotheses, that presents a model of the way nature works and predicts behavior beyond the observations and laws on which it was based

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A proposed solution for your question (what you're testing in an experiment)