1. What are the two classes matter?
A. Atom and molecule
B. Element and compound
C. Plant and animal cells
D. Substance and mixture
2. Which is true regarding water ?
A. Compound of element
B. Element of gases
C. Mixture of gases
D. Substances of gases
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Answer:
1. LETTER D. SUBSTANCE AND MIXTURE
2. LETTER B. ELEMENT OF GASES