Problem: In medicine, a spirometer is an instrument for measuring the air capacity of which part of the body?
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A: lungs

Problem: The Liverpool FC anthem You'll Never Walk Alone comes from which Rodgers and Hammerstein musical ?
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A: carousel

Problem: Which ancient European period came before the Iron Age?
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A: bronze age

Problem: What two word phrase means the smallest amount of fissile material needed for a sustained nuclear chain reaction?
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A:
critical mass