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Embed code for: 5. What causes a storm
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Task: Come up with 5 geographical questions that you have about the images in the source above.
Who, what, where, when and why?
To investigate the atmospheric conditions required for a storm.
To describe and explain the impacts of the recent storm event.
Key Vocabulary: Low pressure, high pressure, air mass, cold front, warm front, weather conditions, changeable weather, depression, weather chart.
What causes storms?
Storms are created when there is a clash between warm and cold air masses. It starts when a wedge of warm air pushes into the cold air mass. The warm air rises. So air pressure falls. Cold air rushes in to replace the warm air creating strong winds.
The warm rising air cools, and its water vapour condenses. So banks of cloud form. And then the rain begins. So now we have strong winds and rain.
The resulting weather system is called a depression. It moves eastwards in the UK. Depressions can take up to three days to cross the UK. And while its crossing, we have stormy weather.
Depressions move because they are dragged by a wind called the jet stream, which flows along at the top of the troposphere (since its so high up we do not feel it).
Task: Read and use the above source to answer the following questions.
Imagine you are outside your home and there is a wild storm. What can you see and how do you feel?
What creates the strong winds in a storm?
Storms are quite common in he UK. Why?
Depressions are areas of ____ atmospheric pressure which produce cloudy, rainy and ________ weather. These low-pressure systems often begin in the Atlantic, moving ____________ towards the UK. They are responsible for the UK's _________ weather.
changeable windy low eastwards
The diagram shows a depression with a leading warm front and a trailing cold front moving from west to east across Britain.
What are depressions?
Anticyclones are the opposite of depressions - they are an area of high atmospheric pressure where the air is sinking.
Task: Make a copy of the diagram in your booklets.
Question: What are anticyclones and what weather do they bring to the UK?
What are anticyclones?
Task: Using independent research on your netbooks find out how Storm Desmond impacted the UK.
Write the impacts of the storm you find on the diamond 9 grid in your booklets with the most significant impact in your opinion a the top of the diagram.
Categorise the impacts into social, environmental and economic impacts.
How do storms impact the UK
What was the most significant impact of Storm Desmond. Explain your answer.
What colour hat best represents the way you sorted your statements?
Would your answer change if I gave you a different colour hat?
How do storms impact the UK