© boardworks ltd 2003 1 of 19 how can we measure the weather?

© Boardworks Ltd 20031 of 19

How can we measure the weather?


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Rainfall

Rain gauge


Temperature

Thermometer


Wind vane

Wind direction

The wind has come from the north. It is a northerly wind.

the arrow points into the wind


See if you can spot a wind vane in your local area.

Wind direction


Anemometer

Wind speed

The wind pushes the cups around. The faster it turns, the stronger the wind!


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+


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


Air pressure

Barometer


Cloud types

Observation

Cirrus

Cumulus

Cloud Cover(in oktas)

clear sky


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?


Make your own rain gauge!

You will need the following equipment :

a 2 litre, empty, soft drinks bottlescissors and sellotapecontainer and stonesmeasuring jug.



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.


Why is this an unsuitable location for your rain gauge?



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.


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.


This is a photo of a weather recording station in Chile.

Can you recognise any of the instruments?

© boardworks ltd 2003 1 of 19 how can we measure the weather?

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