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Physical Science - 2A Quiz
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14 Terms
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matter
anything that occupies space and has mass
2
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law of definite proportions
the law that states that the masses of chemical substances combine in definite, characteristic integer ratios when forming compounds
3
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particle model of matter/kinetic model
a model that states that all physical matter exists in the form of particles (atoms or molecules) in constant motion
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atom
the building block of all matter, consisting of protons, electrons, and neutrons
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molecule
a distinct group of two or more covalently bonded together
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(Democritus)
believed that matter was made of indivisible atoms and that nothing existed between them
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(Aristotle)
believed that matter consisted of a continuum that could be infinitely cut without changing the characteristics of that matter
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element
a pure substance that consists of atoms with the same atomic number
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compound
a pure substance consisting of atoms of two or more different elements that are chemically combined
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weight
the measure of gravity acting on the matter in an object
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mass
amount of matter in an object
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diffusion
when the scent of pizza spreads throughout the house
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brownian motion
theory that came about with an experiment of plant spores (parts of the spores moved randomly)
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behavior of gases and data from chemical reactions
what evidence proved that a model of matter was made of atoms?
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