1. CLOUD OBSERVERS QUIZ TESTING THE ‘OLD GREY MATTER’ There are fifteen questions in total, groups of five with the answers on the consecutive slide. When ready, click to advance.

2. 01. Which of these revolving weather systems is the smallest – hurricane, typhoon, tropical cyclone or tornado? 02. What colour of a single rainbow is on the inside of the rainbow’s arc, given the generally defined seven- colour rainbow? 03. Okta was a unit of measurement for what? 04. What common term refers to the amount of water vapour that is held in the air? 05. Treasure Island author Robert Louis Steven’s father was responsible for what significant weather-related invention?

3. 1.TORNADO 2. VIOLET 3. CLOUD COVER 4. HUMIDITY 5. STEVENSON SCREEN

4. 06. What shipping forecast area lies immediately South of Forties off the British Isles? 07. What is the circulating Atlantic Ocean current which warms Western Europe? 08. What are the narrow bands of strong winds called which move around the world between about six and twelve miles high? 09. Towards which direction (North, East, South or West) is a rainbow normally seen in the afternoon? 10. What cloud term means ‘sheet’ or ‘sheetlike’ or layer?

5. 06. DOGGER 07. THE GULF STREAM 08. JET STREAMS 09. EAST 10. STRATUS

6. 11.In the Northern hemisphere an area of low pressure produces what wind direction? 12.What number does ‘storm’ equate to on the Beaufort Scale of wind force? 13.What is minus 40 degrees Farenheit expressed as degrees Centigrade? 14.What are cirrus clouds made of? 15.What is a radiosonde?

7. 11. ANTI-CLOCKWISE 12. TEN 13. MINUS 40, THE SAME 14. PARTICLES OF ICE 15. A LIGHTWEIGHT PACKAGE OF WEATHER INSTRUMENTS FITTED WITH A RADIO TRANSMITTER AND CARRIED UP INTO THE ATMOSPHERE BY A BALLOON

8. Compiled by MIS on behalf of Cloud Observers2010