Problem: In March 1918, the capital of Russia was moved to where?
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A: moscow

Q: Named after a bird which scenic railway line runs from Norwich to Cromer and then onto Sheringham?
A: bittern line

Problem: Which Englishman is credited with the discovery of oxygen?
Answer: joseph priestley

Q: What field of work is Alessandro Volta (1745-1827) best known for?
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A: electricity

Q: Who was the British Foreign Secretary who cleared Kim Philby of being the 'Third Man' in the 1955 Commons debate?
What is the answer?

A: harold macmillan

Problem: What unit of length is defined as the mean distance between the earth and the sun (approximately 149,597,871 km)?
======
A:
astronomical unit