Hurumanu - Science - 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. Straw  4x
2. Styrofoam Cup  4x
3.   Pencil
4.   Pin
5.   Tape

STEPS

1. Put holes on both the sides of the cups
2. Tape the straw together, making it longer that's why we need 4 straws because the straws will be too small, the cups aren't gonna do what they're supposed to do because they're going to be too close to each other.
3. Poke the straw on the holes on each cups securing it with tape to it won't fall of when it spins.
4.  Put the straws with cups together, making a cross , one on top of another
5. Pin the middle of the straws through the eraser of the pencil, make sure it doesn't come off
6. After you've finished, test it if it moves with the wind, if it spins by blowing on the cups.

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

Group size: 5

I had Kayla, Jayden and James in my group

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 timekeeper 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.	10s	11
2.	10s	13
3.	10s	7
4.	10s	24

• Can you make a statement connecting the number of spins of your anemometer and the speed of the wind?  The last source of wind made my group and I's anemometer spins faster and since it spins faster, the number of spins increases.

CONCLUSION:

My group and I tried another technique, more like another source of the wind. Our teacher suggested us a really good idea, a heat pump, since we use it in the classroom because the weather was cold. I figured out that it's because the anemometer is closer to the source of the wind. The heat pump makes our anemometer spins faster, since it spins faster, the number of spins increases. Overall, the heat pump spins faster out of 4 of them.