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Matter I. Matter – Anything made up of atoms that takes up space A. Mass – the amount of matter in an object (mass remains constant) B. Weight – the force of gravity on an object (weight can change based on the force of gravity) C. The Law of Conservation of Mass 1. Mass can’t be created 2. Mass can’t be destroyed 3. Mass can change from one form to another D. Properties of Matter 1.Mass – (grams) 2.Volume – The amount of space matter occupies (cm3/ml) 3. Density – mass per unit of volume (g/cm3) 4. State/Phase – Solid, Liquid, Gas, Plasma 156 lbs 26 lbs 71.8 kg 71.8 kg