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science
observation, identification,description,experimental,nvestigation, and theoretical explanation
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chemistry
the science of the composition structure, properties and reactions of matter especially of atomic and molecular systems
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solids
shape-definite does not change
volume-definite
particles-are close together, they cling to each other
compressibilty-very slight less than liquids
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liquids
shape-not definte assumes the shape of its container
volume-definite
particles-are close together, are held together by strong attractive forces
compressibiltyvery slight greater than solids
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gases
shape- no fixed shape
volume-indefinite
partiles-particles are far apart compared to liquids and solids
particles move independently of each other
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matter
all material that make up the universe
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hypothesis
explanation of certian facts
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scientific method
- collects facts or data
- formulate a hypothesis
- plan add experiment s and test hypothesis
- modify hupothesis
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homogeneous
- see through
- uniform in appearance
- same properties
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heterogenesous
matter consisting of two or morephysically distinct phases
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pure substance
alsways has same composition
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measurment
a quantative observation
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metric system
a decimal system of units for measurements
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kilogram
standra unit of mass
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volume
space occupied by matter
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thermal enegry
energy associated with the motion of small particles of matter
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temperature
measure of the intensity of thermal energy, or how hot a system is
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density
the raio of the mass of a substance to the volume occupied by that mass
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specific gravity
ratio of the density of that substance to the desity of another substance
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