Matter - Anything that takes up space and has mass, Atom - Smallest particle of matter that can exist by itself, Molecule - Two or more atoms chemically bonded together, Element - Matter that is made of only one kind of atom, Compound - Matter that is made of two or more different kinds of atoms chemically bonded together, Mixture - Matter that contains two or more different chemicals in it that are not chemically bonded together, Periodic Table - A chart of all the different kinds of atoms that exist in the universe, Solid - Matter that has a rigid shape and the particles are closely packed together, Liquid - Matter that can flow and the particles can move around but are still close together, Gas - Matter that has no fixed shape or volume and the particles are very far apart from each other,

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