1. In a chemical change the make up or identity of the substance changes. In a physical change, only the way it looks, feels, etc. changes. Such as water turning to ice.
3. The Law of Conservation of Mass was created by Antoine Lavoisier and it states that the mass of the substances before the reaction= the mass of the product of the reaction
4. Temperature is a measure of how fast the particles of something are moving and thermal energy is the energy that the particles give off when they move faster.
5.Endothermic:baking soda and vinegar, Exothermic: chlorine and sodium(table salt).
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