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chem 1

matter and measurement

TermDefinition
solids tightly packed, little motion, fixed shape/volume
liquids loosely packed, medium amount of motion, fixed volume but no shape
gasses very far apart, lots of motion, no fixed volume/shape
pure substances elements or compounds
elements pure substance that can't be broken down into simpler substances
compounds pure substances made of 2+ elements that are chemically combined
mixtures combinations of pure substances- homogeneous and heterogeneous
homogeneous solution- uniform throughout the entire sample
heterogeneous not uniform throughout the entire
physical properties properties of matter that can be observed without changing composition- color, odor, hardness
chemical properties properties of matter that can be observed thru a change in composition- flammability, reactivity
physical changes change that doesn't end in the formation of a new substance (rip paper), often reversible
chemical changes change that ends in the formation of a new substance (burn paper = soot)
standard unit of mass kilogram
standard unit of distance meter
standard unit of time second
mega 1,000,000 M
kilo 1,000 k
hecto 100 h
deca 10 da
deci 1/10 d
centi 1/100 c
milli 1/1,000 m
micro 1/1,000,000 μ
Created by: user-1862257
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