boiling point - Temperature at which a substance can change from liquid to gas, density - measurment that compares the amount of matter an object has to its volume., element - a pure substance made from a single type of atom, flammability - that can burn easily, matter - anything that has mass and takes up space (has volume), melting point - temperature at which a substance can change from solid to liquid, solubility - ability of a substance to mix into a liquid, atom - basic building block of matter: made of electron, protons and neutrons, product - formed as a result of a chemical reaction, reactant - on the left side of a chemical equation: substances that start a chemical reaction, Exothermic Reaction - a chemical reaction in which heat is released, Endothermic Reaction - a chemical reaction in which heat is absorbed, Thermal Energy - a total kinetic energy (motion) of the tiny particles that make up matter. The faster the particles move, the warmer the matter, Physical Property - a property that is observed without making changes, Chemical Property - a property that requires a chemical interaction,

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