Matter Unit Vocabulary

material that takes up space and has mass

smallest part of all matter

where the most mass of an atom is found

parts of an atom that carry a positive electric charge; found in the nucleus

parts of an atom that carry no charge; found in the nucleus

parts of an atom that carry a negative electric charge; found continually moving around the nucleus in the electron cloud

the part of the atom that takes up the most space; electrons are found here

is a substance that contains only one kind of atom

a substance formed when two or more elements are joined together chemically

the smallest part of a compound

atoms in a molecule joined together

the amount of matter in an object

have a definite size (volume) and shape; particles are packed together tightly and movement is not fast

have a definite size (volume) but no definite shape; particles are more active and farther apart than in a solid

have no definite size or shape; particles are far apart and move very fast

the basic state of matter on the Sun's surface

is a change from a gaseous to a liquid state, caused by the lowering of temperature

is a change from a liquid to a gasous state, caused when a liquid is heated to its boiling point

is a change from a solid to a liquid state

is a change from a liquid to a solid state

is a change from a soild to a gas without going through a liquid state