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matter and energy

matter anything that has mass and takes up space.
mass describes the amount of matter in an object.
weight a measure of the gravitational force.
volume the amount of space that an object takes up, or occupies.
density a measure of the amount of mass 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 a change that affects one or more physical properties of a substance.
chemical change occurs when one or more substances change into entirely new substances with different properties.
law of conservation of mass states that in ordinary chemical and physical charges, mass is not created or destroyed but is only transformed into different substances.
atom are 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 contains a variety of elements and compounds that are not chemically combined with each other.
pure substance elements and compounds
heterogeneous mixture is one that does not have a uniform composition
homogeneous mixture
solid substance has a definite volume and shape
liquid substance has a definite volume but not a definite shape
gas does not have a definite volume or shape
freezing the change in state in which liquid becomes a solid.
melting this change of state from solid to a liquid.
evaporating some particles gain enough energy that they escape from the surface of the liquid to a gas.
boiling a rapid change from a liquid to a gas, or vapor.
condensation this change of state from a gas to a liquid.
sublimation the change from a solid state directly into a gas.
deposition is the change in state from a gas directly to a solid.
Created by: 18tgal0513