[ Vocabulary ]
a process in which one or more substances are converted to one or more different substances
A. conservation of matter
B. closed system
C. chemical reaction
D. reactant

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Vocabulary › Viewto ask questions, examine by questioning
A. interrogate
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Grammar › View
What are the four principal parts of a verb?
A. Infinitive, present participle, past, past participle
B. Infinitive, present, future, past
C. Present, past, future, past participle
D. Infinitive, present, past, future participle