Gas - a state of matter with no definite shape or volume., Solid - The particles in a solid are tightly packed and vibrate in place, which is why solids maintain their shape., Liquid - a state of matter with a definite volume but no definite shape., Plasma - It occurs at very high temperatures and is found in things like stars, lightning, and neon signs., Physical Reaction - change in the appearance, Chemical Reaction - a process where substances combine or break apart to form new substances with different properties.,

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