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Unit 1 book 3

lessons 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
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 property 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 occurs when one or more substances change into entirely new substances with different properties
law of conservation of mass states that in ordinary chemical and physical changes.
atom the smallest unit if an element that maintains the properties of that element.
element is made up of one or more of the same kind of atom chemically combined.
compound made up of different kinds of atoms chemically combined.
mixture a variety if elements and compounds that are not chemically combined with each other.
pure substances a sample of matter, either a single element or a single compound, that has definite chemical and physical properties.
heterogeneous describes something that has a uniform structure or composition throughout.
homogeneous describes something that has a uniform structure or composition throughout.
solid a substance that has a definite volume and shape.
liquid a substance that has a definite volume but not a definite shape.
freezing the change of 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 state from a gas to a liquid
sublimation the change from a solid state directly into a gas.
deposition the change in state from a gas directly to a solid.
Created by: madness25
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