Educational Objective Students will understand how latitude and season affect duration of insolation.
Purpose The purpose of this long term investigation is to use the internet to collect and organize latitude, date and duration of insolation data to help generalize the relationship between latitude, season and duration of insolation.
Procedure Google Earth will be used to locate various cities, towns or villages on approximately similar longitudes but widely different latitudes. Students will then use internet resources to find and record sunrise and sunset times for each location.
Procedure Students will then analyze their collected data to generalize how duration of insolation changes with changing latitude and season.
Materials Computer Lab – this long term investigation should be introduced in a computer lab so that students can see how to initialize and use Google Earth and cnn.com to gather and record the necessary data.
Materials Computers with Excel or some comparable spreadsheet program, Google Earth, and internet access.
Data Duration Latitude Duration Latitude Duration Latitude Duration Latitude Spring Winter Fall Summer Season
Resources Latitude and Longitude for Selected Cities: http:// www.bcca.org/misc/qiblih/latlong_oc.html Sunrise and Sunset Data: http:// aa.usno.navy.mil/data/docs/RS_OneYear.php Spreadsheet Latitude Lookup: http://www.vcaa.vic.edu.au/prep10/csf/support/sampleunits/SolarHouseDaylight.xls Earth and Sun Viewer: http://www.fourmilab.ch/cgi-bin/Earth/action?opt =-p
Questions <ul><li>What is the relationship between latitude </li></ul><ul><li>and duration of insolation? </li></ul><ul><li>2. Compare and contrast seasons in the </li></ul><ul><li>northern and southern hemispheres. </li></ul><ul><li>3. How are the Arctic and Antarctic Circles </li></ul><ul><li>significant in studying duration of insolation? </li></ul><ul><li>4. How are the Tropics significant? </li></ul><ul><li>5. How does duration of insolation change at </li></ul><ul><li>the Equator over the course of the year? </li></ul><ul><li>6. What resource(s) proved to be most helpful </li></ul><ul><li>and why? </li></ul>