Physical vs Chemical

• A physical change is a reversible change in the properties of a substance in which no new substances are formed.
• A chemical change is when the particles that make up two or more substances are rearranged to form a new substance
• The reactant is the substance that changes in a chemical reaction
• The product is the substance that forms in a chemical reaction
• The law of conservation of mass states that the mass of the product is equal to the mass of the reactants used
• Evidence of physical change is when a substance: changes in shape, breaks into smaller pieces, dissolves, changes state, is mixed with another substance
• Evidence of chemical change is when a substance: permanently changes colour, produces gas, produces light, changes temperature, deposits metal, forms precipitation, makes smell