Quiz answers
- d) The Milky Way has four spiral arms radiating out from a central cluster of stars or "nucleus". Our solar system is located on one of the spiral arms, 27,000 light years from the centre.
- a) The most dangerous animal in the world is the mosquito. Over 2 million deaths per year result from malaria infection caused by mosquito bites. They also transfer diseases to over 70 million people each year.
- c) physics. WIMP is an acronym for weakly interacting massive particle and MACHO is an acronym for massive (astrophysical) compact halo object.
- Caenorhabditis elegans, more commonly known as a roundworm
- Irrigated agriculture uses water pumped or piped onto land to grow crops or pastures. In an average year irrigated agriculture uses 14,000 gigalitres (GL) of water, about 65 per cent of all water use in Australia.
