6.4.5 Use appropriate instruments and tools to collect weather data (including wind speed and...
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- Slide 1
- 6.4.5 Use appropriate instruments and tools to collect weather
data (including wind speed and direction, air temperature,
humidity, and air pressure. Weather Tools
- Slide 2
- Essential Question What weather instruments and tools do
scientists use to measure weather and how do they work? ?
- Slide 3
- Anemometer Measures the wind speed in miles per hour. To use
it, count the number of rotations in one minute (rpm). You can then
convert that to miles per hour. Thats a complex formula. ;)
- Slide 4
- Wind Vane A tool used to measure wind direction. Sometimes
referred to as a wind-weather vane or a wind sock. Wind direction
is described by the direction from which the wind is blowing as
indicated by the pointer.
- Slide 5
- Sling Psychrometer A two-thermometer instrument also referred
to as a wet-dry bulb; Used to measure the relative humidity (the
amount of water vapor in the air). Temperature readings are
converted using a relative humidity table.
- Slide 6
- How do I use it? 1. Find the dry bulb reading. 2. Find the wet
bulb reading. 3. Subtract the wet bulb from the dry bulb.
(Difference) 4. Use the chart to calculate the relative
humidity.
- Slide 7
- Practice using a sling psychrometer. 1. Use the following
table. Trial #Dry BulbWet BulbDifference b/wHumidity 1 2 3 4 5 6 7
8 9 10
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- Trial #1 Dry BulbWet Bulb
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- Trial #2 Dry BulbWet Bulb
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- Trial #3 Dry BulbWet Bulb
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- Trial #4 Dry BulbWet Bulb
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- Trial #5 Dry BulbWet Bulb
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- Trial # 6 Dry BulbWet Bulb
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- Trial # 7 Dry BulbWet Bulb
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- Trial # 8 Dry BulbWet Bulb
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- Trial # 9 Dry BulbWet Bulb
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- Trial # 10 Dry BulbWet Bulb
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- What do you notice about the relationship between the readings
and the humidity?
- Slide 19
- Barometer Measures the air pressure in inches of mercury or
millibars (mb) There are two pointers: The one inside the glass is
the current reading and it moves according to the air pressure. The
one on top is the set pointer. You move it so you will know
tomorrow what the setting was today.
- Slide 20
- Using the Barometer 1. Find the current reading. That would be
the full arrow. 2. Read the set pointer. That would be the half
arrow. 3. Compare the current reading to the set pointer If the
current reading is higher, then the air pressure is rising
indicating fairer weather on the way. If the current reading is
lower, then the air pressure is falling indicating rainy conditions
may be coming. https://www.youtube.com/watch?v=i2UKTpIQG6M
- Slide 21
- Thermometer A tool used to measure air temperature in degrees
Fahrenheit or Celsius. To determine the temperature, read to the
highest mark on the scale as indicated by the red dye.
- Slide 22
- Rain Gauge A tool used for measuring the amount of
precipitation in inches or centimeters.
- Slide 23
- Using the Rain Gauge Rain gauges work just like a graduated
cylinder, so measure to the meniscus (the dipped portion).