Time Required minutes (will vary with class size)
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1 Teacher Instruction Measuring Wind Speed QuickView Students use an anemometer to measure wind speed at various distances and graph the results. Standards Addressed NSTA 5-8 Students develop abilities necessary to do scientific inquiry. Students identify questions that can be measured through scientific inquiry. Students use appropriate tools and techniques to gather, analyze, and interpret data. Students think critically and logically to make the relationships between evidence and explanations. Students use mathematics in all aspects of scientific inquiry. Students develop an understanding of motions and forces. Students understand the motion of an object can be described by its position, direction of motion, and speed and that motion can be measured and represented on a graph. Time Required minutes (will vary with class size) Content Areas Primary: Math Secondary: Technology, science Vocabulary anemometer data graph speed wind NCTM 6-8 Students use mathematical models to represent and understand quantitative relationships. Students model and solve contextualized problems using various representations, such as graphs, tables, and equations. T-15
2 Measuring Wind Speed Teacher Instruction Materials Anemometer Electric fan Tape measure Pencil Colored pencils or markers Masking tape Wind Speed worksheet Graph paper T-16
3 Teacher Instruction Measuring Wind Speed Procedure 1 Find an open space in the work area to perform this activity. Plug the fan into an electrical source. There are safety precautions you should follow when completing this activity. The fan has a spinning motion and operates at a fairly high rate of speed. It is important to keep your hands and fingers at a safe distance when operating this piece of equipment. Never reach inside the fan cage or grab the blades when they are moving. It is a good idea to speak with the students about practicing good safety habits when performing this activity. Make sure the wind produced by the fan is not going to disturb the workspace of other students. 2 Use the tape measure to measure a distance of 18" from the base of the fan. Place a piece of masking tape on the work surface to identify this distance. 3 Turn on the fan to the low speed setting. 4 Position the anemometer directly above the masking tape that marks 18" from the base of the fan. Hold the anemometer so you can easily read the scaled increments indicating wind speed and so you get the highest wind speed possible. Students may need to adjust the position height of the anemometer to get the highest wind speed. 5 Read the anemometer scale to determine the wind speed at a distance of 18". You may need to provide proper instructions for use and reading of the anemometer you provide. 6 Turn off the fan and record the wind speed of the first distance in the corresponding cell of the Wind Speed worksheet. 7 Repeat this procedure to obtain wind speed recordings for medium and high fan settings. Be certain to position the anemometer at the 18" marked distance and record the speeds into the corresponding cells on the Wind Speed worksheet. At the end of this step, students should have three wind speeds recorded in the table, one entry for each fan setting at a distance of 18". 8 Use the tape measure to measure a distance of 36" from the base of the fan. Place a piece of masking tape on the work surface to identify this distance. 9 Turn on the fan to the low speed setting. T-17
4 Measuring Wind Speed Teacher Instruction the anemometer directly above 10Position the masking tape that marks 36" from the base of the fan. Hold the anemometer so you can easily read the scaled increments indicating wind speed. the anemometer directly above 16Position the masking tape that marks 48" from the base of the fan. Hold the anemometer so you can easily read the scaled increments indicating wind speed. the anemometer scale to determine 11Read the wind speed at a distance of 36". 17Read the anemometer scale to determine the wind speed at a distance of 48". off the fan and record the wind 12Turn speed of the second distance in the corresponding cell of the Wind Speed worksheet. off the fan and record the wind 18Turn speed of the third distance in the corresponding cell of the Wind Speed worksheet. this procedure to obtain wind 13Repeat speed recordings for medium and high fan settings. Be certain to position the anemometer at the 36" marked distance and record the speeds into the corresponding cells on the Wind Speed worksheet. At the end of this step, students should have three wind speeds recorded for the fan setting at a distance of 36". this procedure to obtain wind 19Repeat speed recordings for medium and high fan settings. Be certain to position the anemometer at the 48" marked distance and record the speeds into the corresponding cells on the Wind Speed worksheet. At the end of this step, students should have three wind speeds recorded for the fan setting at a distance of 48". 14Use the tape measure to measure a distance of 48" from the base of the fan. Place a piece of masking tape on the work surface to identify this distance. 20Turn off the fan and properly store the equipment used to complete this activity. on the fan to the low speed 15Turn setting. the questions located on the 21Answer Wind Speed worksheet. T-18
5 Teacher Instruction Measuring Wind Speed 22Use graph paper, colored pencils or markers, and the data gathered from this experiment to create a graph that represents the change in wind speed. The x-axis (horizontal) should represent the distance from the fan and the y-axis will represent the wind speed. A different colored pencil or marker will indicate each of the fan settings. For example, a blue colored pencil or marker might be used to represent the low fan speed setting. There are many ways to represent the data in the table, but the most appropriate way would be to use a bar graph. T-19
6 Measuring Wind Speed Teacher Instruction Wind Speed Answer Key Distance 18" 36" 48" Wind Speed mph Fan Setting Low Wind Speed mph Fan Setting Medium Wind Speed mph Fan Setting High What fan setting generated the highest wind speed? Student answers will vary. What distance generated the highest wind speed? Student answers will vary. What is the mph difference between the lowest and highest recordings? Student answers will vary. What happened to the wind speed as the distance from the fan increased? Student answers should explain how the wind speed decreased as the distance from the fan increased. Based on the recorded data, explain the relationship between wind speed and distance from the fan. Student answers should reflect the fact that wind speed was highest at the closer distances and decreased as the distance increased. T-20
Table of Contents. Engineering Challenge II Supplemental Lessons...91 Resources
Table of Contents Activity Overview.................................................. 3 Standards Addressed by Activity...................................... 4 Construction QuickView.............................................
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