Review for Snapshot 1

​•Physical change is one that does not alter the identity of a substance.

Examples:

•Cutting, Crushing and breaking into smaller Pieces.

•Changing  the state of matter such as: melting, freezing and  condensation.

•Dissolving salt in water(It’s still Salt).

•A chemical change occurs when one or more substance changes into one or more different substances.

•Example: Iron rusting(Oxidation of the iron)

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•4Fe + 3O2                               2Fe2O3

Iron +Oxygen(reactant)                Iron(111) Oxide(product)

Physical & Chemical Properties of iron are different then Iron Oxide​