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Unit 1~ Matter

Lessons 1-6

TermDefinition
matter anything that has mass and takes up space
mass describes the amount of matter in an object
weight a measure of gravitational force on an object
volume the amount of space 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 describes a substance's ability to change into a new substance with different properties
physical change is a change that affects one or more physical properties of a substance
chemical change when one or more substances change into entirely new substances with different properties
law of conservation of mass states that ordinary chemical and physical changes, mass is not created or destroyed but is only transformed into different substances
atom the smallest unit of an element that maintains the properties of that element
element made up of one or more at the same kind of atom chemically combined
compound made up of different kinds of atoms chemically combined
mixture contains a variety of elements and compounds that aren't chemically combined with each other
pure substances elements and compounds
heterogeneous mixture is one that does no have a uniform composition
homogeneous mixture where substances are evenly spread throughout
solid definite volume and shape
liquid substance has a definite volume but not definite shape
gas does not have a definite shape or volume
freezing the change in state in which a liquid becomes a solid
melting change of state from a solid to a liquid
evaporation the change of state from a liquid to a gas that usually occurs at the surface of a liquid over a wide range of temperatures
boiling a rapid change from a liquid to a gas or vapor
condensation the change of a state from 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: 18ljansberg1015
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