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The law of conservation of energy states that energy remains constant and is transformed from one form to another.
Which of the following statements BEST supports this law?
The energy of a system is not affected by a physical change in a system.
The energy of the system changes only when a chemical reaction occurs.
The energy of the system changes only when the temperature of the system changes.
Any change in energy must be balanced by a transfer of energy into or out of the system.