Hurumanu - Weather

                        Weather and Climate Change 

                                                Extreme weather

                                               Measuring weather.

                                          Wind

Beaufort Wind Scale

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

                                    Wind speed - Making an anemometer.

MATERIALS

   

1.    4 cups 
2.    4 straws 
3.    Pencil
4.    Tape
5.     Pin

STEPS

1.   Get all your materials and ready to start.
2.   Get two straw and put the end of the other straw inside of the other straw.
3.   Put a tape on the straws and you can create a x or + shape to see that you did write.
4.   Put some pin on the straw to keep it secure and not able to broke if by the wind.
5.   Under your cross and plus shape you can see something the pin poking out grad your pencil and push the eraser bit.
6.  Now your done and you can the observation.

Once you have made an anemometer we are going to record the wind speed.

Group size: 5

You will need:

Anemometer (above) 

Roles:

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

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. If possible, repeat the above step four (4) times and record the average number of spins on the chart.

FINDINGS

• Record how many times it spins using the table below.

You will need to create the wind yourself by blowing. Get 4 different wind speeds by blowing.

You will need to time them and count the number of spins.

	Time Interval	Number of Spins
1.	10 sec	15
2.	10 sec	14
3.	10 sec	16
4.	10 sec	12

• Can you make a statement connecting the number of spins of your anemometer and the speed of the wind? 

CONCLUSION:

I think i really enjoy this experiment because i learn something new while doing this because at first i really don't know what is Anemometer and how to use this but because of this experiment i know the it using to measure the wind. A also enjoy the part that we need to make our own anemometer and the time that we test it. I really enjoy this experiment because i learn something new that i didn't know before.