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Thursday, August 8, 2019

Weather.

Hurumanu - Weather

Weather and Climate Change 

Measuring weather.

Wind

Beaufort
Force
Wind Speed
(KPH)
SpinsIndicatorsTerms Used in NWS Forecasts
00-20Calm; smoke rises vertically.Calm
12-510Shown by the direction of wind smoke drift, but not by wind vanes.Light
26-1240The wind felt on face, leaves rustle; ordinary vanes moved by wind.Light
313-2080 Leaves and small twigs in constant motion; wind extends light flag.Gentle
421-29130Raises dust and lose paper; small branches are moved.Moderate
530-39190Small trees in leaf begin to sway; crested wavelets form on inland waters.Fresh
640-50250Large branches in motion; whistling heard in telephone wires; umbrellas used with difficulty.Strong
751-61320Whole trees in motion; inconvenience felt walking against the wind.Strong
862-74390Breaks twigs off trees; generally impedes progress.Gale
975-87470Slight structural damage.Gale
1088-101550Seldom experienced inland; trees uprooted; considerable structural damage occurs.Whole gale
11102-116640Very rarely experienced inland; accompanied by widespread damage.Whole gale
12117 or more730+Very rarely experienced; accompanied by widespread damage.Hurricane

Wind speed - Making an anemometer.

Anemometer

MATERIALs

 

  1. Pencil
  2. Tape
  3. pin
  4. cups (4)
  5. Straws (4)       

STEPS

  1.   Put the straws into a cross 
  2.   Tape the straws together 
  3.   Poke holes into the cups
  4.   Put the straws into the cups 
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 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 IntervalNumber of Spins
1.10 seconds11/3
2.10 seconds11/2
3.10 seconds41/14
4.10 seconds 41/14
  • Can you make a statement connecting the number of spins of your anemometer and the speed of the wind? 

CONCLUSION:


Due to the calm wind weather, we had to use our mouth to get the anemometer to move around.
As you can see up in that chart some of them did not last for that long. 
After a while, the wind picked up so we could use the wind to get it moving and it worked well you can see in the chart that the natural wind got it moving a lot more.  



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