PAPER 1: SECTION A: WEATHER HAZARDS

2. TROPICAL STORMSUse your exercise book – this is REVISION

Missing work? Ask your teacher or borrow a book.Tables will need to be made bigger – check before you print.

Use your book (or the internet) to give a definition of a tropical storm:

Tropical storms are known as hurricanes, cyclones and typhoons. Using the map in the box below, match up the name with the correct area using a line or colours:

Hurricanes Japan and the PhilippinesTyphoons USA and CaribbeanCyclones South-east Asia and Australia

Use the map below to describe the distribution of tropical storms. Hint: What lines of latitude do they lie between? Wht oceans do you find them in? Which directions do they move in?

Complete the sentences below explaining the formation of a tropical storm.

15 highest Equator CoriolisRotating 27 Spin Autumn

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Tropical storms form:a) over warm water (over _____˚c).b)in the seasons of summer and ___________ when sea temperatures are at their _____________.c) 5 - ____˚ north and south of the ___________.Tropical storms spin because the Earth is _____________. This is called the Coriolis effect.They do not form at the Equator because the ___________ effect is not strong enough here for tropical storms to __________.

Using your homework on global atmospheric circulation, answer these questions:

What does ITCZ stand for?ITCZ

There is low air pressure at the ITCZ. Why does this explain why this area gets a lot of rain?

Write these sentences into the correct order next to the diagram below to explain the formation of a tropical storm:

Rising air draws up more air and water vapour from the warm ocean causing strong winds.

The Coriolis effect causes the air to spin upwards around a calm centre eye of the storm.

Rising air cools, condenses and storm clouds are formed.

It reaches land and its water supply is cut off so it dies.

Warm oceans (27˚c) create low pressure.

Prevailing winds push the storm across the sea.

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How a tropical storm is formed:

Tropical storms are measured using the Saffir Simpson Scale. Use a line or colours to complete the table below:

Saffi

r Si

mps

on

Picture Wind speed: Damage

1

3

2

3

4

5

Summarising your understanding (optional)Use the information above and your book to answer these questions:Explain why the following are needed for a tropical storm to form:

a) Sea temperature above 27˚c

b) Not along the equator

c) Over the ocean

What happens to a tropical storm when it reaches land? Explain your answer.

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