PDF chapter test TRY NOW
Read the statement and select the correct answer:
A)
Statement 1: Air is mainly composed of hydrogen and krypton.
Statement 2: The primary constituent of air is nitrogen and krypton.
Statement 2: The primary constituent of air is nitrogen and krypton.
B)
Deep-sea divers carry oxygen cylinders with them because
Statement 1: There is less oxygen in the deep sea.
Statement 2: The oxygen is used to keep them warm.
Statement 1: There is less oxygen in the deep sea.
Statement 2: The oxygen is used to keep them warm.
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