Recall the following definition:
Classify each of the following as an observation, a law, or a theory.
(a) All matter is made of tiny, indestructible particles called atoms.
(b) When iron rusts in a closed container, the mass of the container and its contents does not change.
(c) In chemical reactions, matter is neither created nor destroyed.
(d) When a match burns, heat is evolved.
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What scientific concept do you need to know in order to solve this problem?
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