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Eight Period Madness

Across
A chemical change is a process where one or more substances are altered into one or more new and different substances.
The Law of Conservation of Mass states that in any closed system the amount of mass will remain constant over time
a substance that takes part in and undergoes change during a reaction
Down
Cause to happen suddenly, unexpectedly, or prematurely
A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another.
an article or substance that is manufactured or refined for sale