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Unit 2.1 Vocabulary

Unit 2.1- Matter & Its Interactions

TermDefinition
Atom the smallest part of a substance that cannot be broken down chemically
Element a substance made up of one type of atom
Molecule two or more atoms connected by chemical bonds, SAME or DIFFERENT
Compound a substance made up of two or more DIFFERENT elements
Matter anything that has mass and takes up space
Pure Substance a substance made of only one type of particle
Mixture combination of two or more pure substances, each substance retains its properties
Phase Change when matter changes from one state to another: solid, liquid, gas
Thermal Energy the total kinetic energy contained within a system that is responsible for temperature
Kinetic Energy energy from motion
Heat thermal energy transferred between two systems at different temperatures
Melting when a substance changes from solid to liquid
Freezing when a substance changes from liquid to a solid
Condensation when a substance changes from gas to liquid
Evaporation when a substance changes from liquid to a gas
Created by: MsOlivia
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