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13 Cards in this Set

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  • Back
variable
anything that can change in an experiment
whats the difference between precision and accuracy?
precision- the degree of exactness of a measurement

accuracy- the extent to which the measurement approaches the true value
element
a substance that cannot be broken down into simpler substances
compound
a substance made of atoms of more than one simple machine
pure substances
any matter that has a fixed composition and definite properties
mixtures
a combination of more than one pure substance
miscible
describes two or more liquids that are able to dissolve into each other in various proportions
immiscible
describes 2+ liquids that dont mix into each other
viscosity
resistance of a fluid to flow
chemical properties
the way a substance reacts with others to form new substances with different properties
physical properties
a characteristic of a substance that can be observed or measured without changing the composition of the substance
formula for density
D=m/v


MD/V
wats the difference between theories and laws?
Theory
*explanation that has been tested
*always questioned and examined
*simple
(kinetic theory)

Law
*about anture
*no explanation
repeated observations (wat goes up must come down)