© boardworks ltd 2003 1 of 19 how can we measure the weather?
TRANSCRIPT
© Boardworks Ltd 20031 of 19
How can we measure the weather?
© Boardworks Ltd 20032 of 19
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© Boardworks Ltd 20033 of 19
Rainfall
Rain gauge
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Temperature
Thermometer
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Wind vane
Wind direction
The wind has come from the north. It is a northerly wind.
the arrow points into the wind
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See if you can spot a wind vane in your local area.
Wind direction
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Anemometer
Wind speed
The wind pushes the cups around. The faster it turns, the stronger the wind!
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Beaufort scale
Beaufort Force
Type of wind Effects Speed in kph
0 Calm Smoke rises vertically 0
1 Light air Smoke drifts 1-5
2 Light breeze Wind felt on face, leaves rustle 6-11
3 Gentle breeze Leaves and small twigs move 12-20
4 Moderate breeze
Small branches move 21-30
5 Fresh breeze Small trees sway 31-40
6 Strong breeze Large branches sway, umbrella used with difficulty
41-50
7 Moderate gale Whole trees sway 51-60
8 Gale Twigs break off trees, hard to walk into wind
61-74
9 Strong gale Chimney pots and slates blow off 75-87
10 Storm Trees uprooted 85-100
11 Violent storm Rarely occurs inland 101-115
12 Hurricane Disastrous, widespread damage 115+
© Boardworks Ltd 20039 of 19
Beaufort
Effects Speed in kph
0 Smoke rises vertically 0
1 Smoke drifts 1-5
2 Wind felt on face, leaves rustle 6-11
3 Leaves and small twigs move 12-20
4 Small branches move 21-30
5 Small trees sway 31-40
6 Large branches sway, umbrella used with difficulty
41-50
7 Whole trees sway 51-60
8 Twigs break off trees, hard to walk into wind
61-74
9 Chimney pots and slates blow off
75-87
10 Trees uprooted 85-100
11 Rarely occurs inland 101-115
12 Disastrous, widespread damage
115+Match the pictures to the descriptions on the Beaufort Scale. Write your answers in kph.
C
B
A
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Air pressure
Barometer
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Cloud types
Observation
Cirrus
Cumulus
Cloud Cover(in oktas)
clear sky
© Boardworks Ltd 200312 of 19
Make your own weather station!
How can you measure temperature without a thermometer?
How can you measure wind speed without an anemometer?
How can you measure wind direction without a wind vane?
How can you collect and measure rainfall?
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Make your own rain gauge!
You will need the following equipment :
a 2 litre, empty, soft drinks bottlescissors and sellotapecontainer and stonesmeasuring jug.
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Make your own rain gauge!
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Make your own rain gauge!
1. Find a 2 litre, soft drinks bottle.2. Cut the top off the bottle and insert it into the remaining
section to make a funnel.3. Secure the funnel with sellotape.4. Put your rain gauge outside, in an open space. Secure
the rain gauge in a container with stones around its base.
5. Take readings every 24 hours by pouring the contents of the rain gauge into a measuring jug.
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Why is this an unsuitable location for your rain gauge?
Make your own rain gauge!
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Days Monday
Tuesday
Wednesday Thursday
Friday
Rain (mm)
Wind speed(km/h)
Wind Direction
Cloud Cover(oktas)
Observations(the clothes you are wearing should indicate how cold it is!)
Draw a results table
Remember to take your measurements at the same time each day.
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Match the instrument to the correct description
This instrument will let you know if the ground is likely to be soft.
This instrument will help you decide whether you need a jumper.
This instrument will let you know if it is going to be good or bad weather.
This instrument will let you know whether it is good weather to fly a kite.
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This is a photo of a weather recording station in Chile.
Can you recognise any of the instruments?