1. quiz15Rogen, Reynolds and Christensen were all born in Vancouver, BC.
  2. The element Hg is mercury.
  3. A faint rising tone coming from the universe – a sound, a ‘chirp’ – indicated two black holes colliding, showed the presence  of gravitational waves, ripples in the fabric of space-time’, conveying an energy ‘50 times greater than that of all the stars in the universe put together’, according to a team of physicists who announced the find this week.
  4. Concrete is the most widely used man-made material,
  5. Spikenard is an aromatic oil, also called nard,derived from a plant of the valerian family.  It is used in perfumes and as a medicine.