1. Which spiral arm of the Milky Way Galaxy contains our solar system?
2. Which is the correct phrase: ‘to rack one’s brain’ or ‘to wrack one’s brain’?
3. What is a more common term for a Pasteur pipette?
4. To what language group do Swahili, Xhosa and Zulu belong?
5. On December 27, 1831, which noted scientist set sail for the Pacific Ocean from England?