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Matter and Energy
Unit 1 Lesson 1
Term | Definition |
---|---|
matter | anything that has mass and takes up space |
mass | amount of matter |
weight | measure of gravitational force |
volume | amount of space an object takes up |
density | measure of the amount of mass |
physical property | characteristic that can be observed without changing the substance |
chemical property | substances ability to change into a new substance |
physical change | change that affects the physical properties of the substance |
chemical change | substance changes into an entirely new substance |
law of conservation of mass | mass is not created nor destroyed by chemical or physical changes |
atom | smallest unit of an element |
element | made of one or more of the same type of atom |
compound | different types of atoms chemically combined |
mixture | variety of elements that are not chemically combined |
pure substances | substance that has definite chemical and physical properties |
heterogeneous | mixture that doesn't have a uniform composition |
homogeneous | substances are evenly spread throughout the mixture |
solid | definite volume and shape |
liquid | definite volume but not shape |
gas | doesn't have a definite volume or shape |
freezing | liquid becomes a solid |
melting | solid becomes a liquid |
evaporation | liquid becomes a gas |
boiling | rapid change from a liquid to a gas |
condensation | gas to a liquid |
sublimation | solid to a gas |
deposition | gas to a solid |