4th Grade Ch. 6 Lesson 4 How do we Measure and Predict the Weather

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4th Grade Ch. 6 Lesson 4 How do we Measure and Predict the Weather

  1. 1. Ch. 6 Lesson 4 How do we measure & predict weather?
  2. 2. Activity- Junior Meteorologist Measuring weather conditions Tue hygrometer Barometer Thermometer Wind vane instrument 57 humidity 1022mb Air pressure 83 F 28 C Temperature south wind direction Wed Thu measures
  3. 3. Make a wind vane YOU NEED: 1 straw 1 straight pin 1 index card pencil with eraser tape DO THIS: 1. Cut the point and tail of an arrow out of an index card. 2. Tape them onto the ends of the straw. 3. Push the pin through the middle of the straw. 4. Stick the pin into the eraser of the pencil. Make sure the straw can turn freely.
  4. 4. meteorologist Study weather conditions- Temp. Water Air movement
  5. 5. Measures amt. of rainfall Rain gauge Shows direction from wind blowing wind vane Measures humidity Hygrometer Shows direction from wind blowing wind vane Measures wind speed anemometer Measures air pressure (mb) barometer Measures air temp. Thermometer Picture How it’s used Weather instrument
  6. 6. 3 basic weather factors that affect weather conditions
  7. 7. A wide ring shows that the weather was favorable, and the tree grew well. tree rings
  8. 8. anemometer This anemometer has four cups which catch the wind and cause the anemometer to spin. The inward curve of the cups receives most of the force of the wind. That's what makes the cups move. The more spins per minute, the greater the wind velocity. Arrange four (4) plastic drinking straws to form a cross and tape them together at the center. Staple the top side of one drinking cup, such as the small paper cups designed for bathroom dispensers, to the end of each straw, so the open ends of the cups all face the same direction. Push a straight pin through the center of the straws into an eraser on the end of a pencil. This provides the axle. Mark one of the cups; this will be the one they use for counting when the anemometer spins. NOTE: When using this anemometer, 10 turns per minute means the wind speed is about one mile per hour. If possible, it would very useful to use a commercial anemometer to determine an approximate determination. For example, "when our anemometer read 20 spins a minute, the commercial anemometer read 2 miles per hour." Blow on the anemometer or turn an electric fan on low to make sure that it spins easily. How many times the anemometer will spin in one minute? Can you make a statement connecting the number of spins of your anemometer and the speed of the wind?  (you can use the table below to record your practice trials).
  9. 9. anemometer # of spins Time interval

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