mass: amount of matter in an object
volume: the amount of space an object takes up
density: the amountof mass in a certain volume of material
physical property a property that can be observed whithout changing the indenty of a substance
physical change: a change in size, shape, or state without forming a new subtances
solution: a mixture of one substance dissolved in another so that the properties are the same throughout
chemical change: a change in matter that produce a new substance with different properties from tthe original
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