Using flashlights or other light sources available in a classroom, measure shadows made by pencils or other classroom objects 5. Measure and record lengths of student's own shadow and of 2 meter pole 6. After recording the data on each day, students will organize their findings in a table 8. Following the last data collection in May, students will make a graph showing their findings for the three dates 9. Use internet bulletin boards and lists to get other classes from different parts of the world to participate in the measuring activity on the same days and at the same times and e-mail their findings to us 10.
Any invention is likely to lead to other inventions.
Once an invention exists, people are likely to think up ways of using it that were never imagined at first. The earth Like all planets and stars, the earth is approximately spherical in shape. To people on earth, this turning of the planet makes it seem as though the sun, moon, planets, and stars are orbiting the earth once a day. They have highly technical material about the history and designs of sundials which could be used as a resource by teachers. This site contains directions on how to make a sundial, as well as a list of books and journal articles about sundials.