matter - anything that has mass and takes up space, mass - the amount of matter in an object, volume - the amount of space that an object takes up, density - a ratio of mass per unit of volume, element - a basic form of matter that can exist as one atom, compound - substance made up of two or more elements bonded together, atom - the smallest particle of an element, molecule - two or more atoms bonded together; the smallest particle of a compound, pure substance - matter of one compound that has defined physical and chemical properties, phase - the state of matter as a solid, liquid, or gas, mixture - two or more substances together in the same space but not chemically bonded, physical property - a characteristic of a substance that can be observed with the 5 senses, chemical property - the ability of a substance to change into new or different substances, chemical formula - uses symbols to explain which elements and how many atoms are in a molecule, chemical bond - a force that holds atoms together in a molecule,

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