Determining the Dew Point Tariq Khan firstname.lastname@example.org
Unit Goal WeatherDew Point Temperature Relative Humidity •Integrate concepts of Dew Point, Temperature and Relative Humidity •Relate Dew Point to Temperature and Relative Humidity •Integrate into Weather Module •Key Idea: The closer the Temperature to RH the lower the Dew Point
Inquiry based Experimental Design Hypothesis Experiment Results• Have students • Does the • Enter Data into create experiment Excel experiment measure the Dew • Plot the Graph based on point? • Analyze results concepts • Teacher • Compare findings• Discuss demonstrates with other experiment then let students groups design with run experiment classmates • Have students think about their observations
Setting up the ExperimentThe Following Apparatus is required to conduct the Experiment:•Regular Drinking Glass•Temperature Probe•Ice Cubes•Glass of Water•Access to computer (for Excel and Data Probe Recording)
Find the Dew Point•The temperature probe will show decreasing temperature in its logging activity screen•Have the students touch the glass and observe the glass for formation of dew•The students should note the temperature at which dew forms
Data collection Dew Point 5:22:34 PM 5:21:50 PM 5:21:07 PM 5:20:24 PM 5:19:41 PM 5:18:58 PM 17 14 23.56 22.81 22.31 21.81 20.81 19.75 19.06 18.75 18.06 16.63 16.13 15.19 15.06 14.44 13.63 13.13 12.63 Time •X-axis indicates the Temperature •Y-axis indicates passage of Time •Dew Point is reached at 12.63•The left column indicates the temperature while the right indicates the time•Sample of the data collected through the probe, the Dew Point is indicated by the lasttemperature recording.
Analysis and InterpretationStudents receive handout with following questions:• Were the results what you expected them to be?• How did adding ice cubes to the water affect the temperature of the water?• What is the time your Dew Point was reached? What was the temperature?• How would you describe the results based on your data?• Create a graph based on your data, do you see a pattern?• Would you change anything about the way the experiment was conducted? Any ideas for further research?
Integrating Ideas Dew Point RelativeTemperature Humidity
Independent InquiryStudents will look up the following topics:• Relative Humidity• TemperatureRelate lab to classroom activity:• Students will define the relationship between Relative Humidity, Temperature and the Dew Point
Incorporating TechnologyStudents with exceptionalities or difficultyintegrating complex ideas can be given a followup activityThe Dew Point calculator integrates all the ideasin our lab activity and lesson planninghttp://www.dpcalc.org/
ConclusionLearning Objectives:• Concepts Learned: Dew Point, Temperature, Relative Humidity• Use of Technology: Data Probe, Excel, Data Logging software, website (http://www.dpcalc.org)• Inquiry based Learning: Students develop the idea for the lab, compare ideas with peers, analyze and interpret results
Video PresentationPlease click on the picture above to be taken tothe YouTube video presentation demonstratingthe lesson activity described