11 Snow


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11 Snow

  1. 1. Wicked Weather Lesson 11 - The Snow of February 2009                   
  2. 2. How often does snow fall: <ul><li>Scunthorpe has sleet or snow falling on average 8 days a year, although it seldom lies of the ground for long. On hills near Scunthorpe snow falls on average for 14 days a year, but in places like the Highlands of Scotland snow falls for about 100 days a year. (On the top of mountains like Ben Nevis, the snow stays for 6-7 months each year.) </li></ul>
  3. 3. How much snow fell last week <ul><li>About 10-20 centimetres of snow fell on Monday. It was the heaviest snow in London for 18 years. </li></ul>
  4. 4. How snow forms: <ul><li>Snow begins in the atmosphere as water condenses into a tiny droplet. As more and more water vapor condenses onto its surface, the droplet grows. Cold air then freezes this water into an ice crystal. The crystal becomes heavier and starts to fall towards the ground. </li></ul>A snow crystal seen through a microscope
  5. 5. How the snow fell across Britain Snow Animation
  6. 6. Why Scunthorpe got so much snow on Monday <ul><li>The arrow shows that the winds were coming from the east of Europe where the air in winter is usually much colder that the UK. The curved black lines show a ‘trough’ of air with clouds and water vapour rising high into the atmosphere, being pushed towards south east England. So, very cold air + moisture = snow! </li></ul>North South
  7. 7.   Temperatures <ul><li>In London, the coldest day recorded in the past 30 years was in 1981. It was -11°C at Heathrow Airport and - 7°C in Central London on that same day. On some days, the temperatures in other parts of London have been even lower, but they weren’t recorded at official weather-collecting points (known as ‘weather stations’). </li></ul>RECORDS LOWEST EVER DAILY TEMPERATURE Scotland -27.2 °C 30 December 1995 Altnaharra (Highlands of Scotland) England -26.1°C 10 January 1982 Newport (Shropshire in western England)
  8. 8. 1. These dogs like snow. 2.Something you can build when its snowy. 3. Put this round your neck to keep warm. 4. The season after winter 5. A wintery month 6. These keep your hands warm when its cold. 7. Some animals do this in winter. 8. When water freezes it becomes. 9. A bird that is often seen in winter. 10. A sport for when it snows Crossword Quiz
  9. 9. Activity – Success Criteria <ul><li>Use the Information sheets to write your own magazine news report about the snow this week. Include these sections: </li></ul><ul><li>   What happened at your school this week </li></ul><ul><li>   What you and your friends do in the snow </li></ul><ul><li>   How much snow fell in Scunthorpe and where did it all come from! </li></ul><ul><li>    How cold was it in Scunthorpe this week? Was it the same everywhere in UK? Why? </li></ul><ul><li>Is this weeks’ weather unusual for Scunthorpe? Is it unusual for other parts of the UK? When (in the past) and where has the weather been worse? </li></ul>
  10. 10. Plenary Wintery Quiz