Hurumanu - Wind power

Extreme weather

Measuring weather.

Definitions:

1.  Anemometer:
2. Beaufort wind scale:

MATERIAL 

1. 2 chop sticks   
2. Cello tape  
3. 4 Glass Cups  
4.   Pencil
5. Pin
6. 
   

STEPS

1.  Cello tape the cups to each end of the sticks 
2.   Cello tape the sticks together to make a cross
3.   Pin the cross to the rubber of the pencil
4.   
5.   
6. 
   

Group Investigation.

Groups size: 5 
Roles:

• Timekeeper
• Counter
• Recorder
• Anemometer Manager
• Wind Manager

1. Mount the anemometer in a place that has full access to the wind from all directions.
2. When the time keeper says "Go", the counter in each group will count how many times the marked cup passes them in one minute and write it down.
3. Repeat the above step four (4) times and record the number of spins on the chart.

Instructions:

• Go to the measuring place and set up your wind gauge.
• Make sure everyone in your group is ready to start their roles.
• Record how many times it spins and record it in the table below.
• Count the number of spins in 15 seconds.
• Record it on your chart.

FINDINGS

	Place name on school grounds	Number of Spins in 15 seconds
1.	Field	20
2.	Old j block site	15
3.	Grass hill in quad	10
4.	Tennis Court Gate	3

• USING A4 PAPER DRAW YOUR RESULTS ON A GRAPH.
• TAKE A PICTURE OF THE GRAPH AND UPLOAD IT TO YOUR BLOG

WHICH IS THE WINDEST AREA AND WHY?

WHICH IS THE CALMEST AREA AND WHY?

WHERE IS THE BEST PLACE ON LAND TO BUILD A WINDMILL?

Beaufort Force	Wind Speed (KPH)	Spins	Indicators	Terms Used in NWS Forecasts
0	0-2	0	Calm; smoke rises vertically.	Calm
1	2-5	10	Shown by direction of wind smoke drift, but not by wind vanes.	Light
2	6-12	40	Wind felt on face, leaves rustle; ordinary vanes moved by wind.	Light
3	13-20	80	Leaves and small twigs in constant motion; wind extends light flag.	Gentle
4	21-29	130	Raises dust and loose paper; small branches are moved.	Moderate
5	30-39	190	Small trees in leaf begin to sway; crested wavelets form on inland waters.	Fresh
6	40-50	250	Large branches in motion; whistling heard in telephone wires; umbrellas used with difficulty.	Strong
7	51-61	320	Whole trees in motion; inconvenience felt walking against the wind.	Strong
8	62-74	390	Breaks twigs off trees; generally impedes progress.	Gale
9	75-87	470	Slight structural damage.	Gale
10	88-101	550	Seldom experienced inland; trees uprooted; considerable structural damage occurs.	Whole gale
11	102-116	640	Very rarely experienced inland; accompanied by widespread damage.	Whole gale
12	117 or more	730+	Very rarely experienced; accompanied by widespread damage.	Hurricane

Spins per minute	Wind speed ( kph)	Beaufort Scale
Field	80	13-20	3
Old J Block site	60	12-14	2
Grass hill	40	6-12	2
Tennis Court Gate	12	2-5	1

CONCLUSION:  

The wind speed on the field was 20 spins every 15 seconds and was 80 kph and the beaufort scale was 3. The wind on the old j block site was 15 spins every 15 seconds and was 60 kph and the beaufort scale was 2. The wind on the grass hill was 10 spins every 15 seconds and 40 kph and the beaufort scale was 2. The wind on the tennis court was 3 spins per 15 seconds 12 kph and the beaufort scale was 1.