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matter and energy

unit 1 - 6

matter anything that has mass and takes up space
mass describes the amount of matter in an object
wieght a measure of the gravitational force on 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 a substance that can be measured without changing the identity of the substance
chemical property describes a substances 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 an entirely new substance with different properties
the law of conservation of mass states that in ordinary chemical and physical change mass is not created or destroyed but is only transferred into different subtaces
atom the smallest unit of an element that maintanes the properties of the element
element made up of one or more of the same kind of atom chemically combinded
compound made up of different kinds of atoms of atoms of atoms chemically combinded
mixture contains a variety of elements and compounds that are not chemically combined with eacother
pure substance a substance that has definite physical and chemical properties
heterogeneous mixture is one that does not have a uniform composition
homogeneous substances that are evenly spread throughout
solid has definite volume and shape
liquid has definte volume but not a definite shape
gas has nor definite volume nor shape
freezing the change in state in which a liquid becomes a solid
melting change from solid to liquid
evaporation liquid to gas
boiling rapid change from liquid to gas or vapor
condensation gas to liquid
sublimation the change from a solid state directly into a gas
deposition gas directly to a solid
Created by: 18khenry0114