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matter

book 3 unit 1, lesson 1-6

TermDefinition
matter anything that has mass and takes up space
mass the amount of matter in an object
weight a measure of the gravitational force on an object
volume the amount of space that an object takes up, or occupies
density a measure of the amount of mass in a given volume
physical property a characteristic of a substance that can be observed and measured without changing the identity of the substance
chemical propety describes a substance's ability to change into a new substance with different properties
physical change a change that affects one or more physical properties of a substance
chemical change a change that occurs when one or more substances change into an entirely new substance with different properties
law of conservation of mass states that in ordinary chemical and physical changes, mass is not created or destroyed but it only transferred into different substances
atoms the smallest unit of an element that maintains the properties of that element
element one or more of the same kind of atom chemically combined
compound different kinds of atoms chemically combined
mixture a variety of elements and compounds that are not chemically combined with each other
pure substances elements and compounds. a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity
heterogeneous a mixture that does not have uniform composition
homogeneous mixtures were the substances are evenly spread throughtout
solid substance has a definite volume and shape
liquid substance has a definite volume but not a definite shape
gas substance does not have a definite volume or shape
freezing the change in state in which a liquid becomes a solid
melting the change of state from a solid to a liquid
evaporation particles gain enough energy that they escape from the surface of the liquid and become a gas
boiling a rapid change from a liquid to a gas, or vapor
condensation the change of a state from a gas to a liquid
sublimation the change from its solid state directly into a gas
deposition the change in state from a gas directly to a solid
Created by: 18phans0918
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