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Matter and Energy

Unit 1 Vocabulary

TermDefinition
matter anything that has mass and takes up space
mass the amount of matter in an object
weight a measure of gravitational force on a an object
volume the amount of space that an object takes up
density a measure of the amount of mass in a given volume
physical property a characteristic of 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 effects 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 mass states that in 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 of the same kind of atom chemically combined
compound made up of different kinds of atoms chemically combined
mixture a variety of elements and compounds that are not chemically combined with each other
pure substance a substances that has definite physical and chemical properties
heterogeneous a mixture that does not have a uniform composition
homogeneous a mixture that does have a uniform composition
solid a substance tat has a definite volume and shape
liquid a substance that has a definite volume but not a definite shape
gas does not have a definite volume or shape
freezing the changing in a state in which a liquid becomes a solid
melting a change of state in which a solid turns into a liquid
evaporation when liquid becomes a gas
boiling when a liquid changes to a gas rapidly or a vapor
condensation when gas changes into a liquid
sublimation when a solid changes directly into a gas
deposition when a gas changes directly into a solid
Created by: 18kstuber0729
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