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This is an activity about the concept of direct versus indirect sunlight. Learners construct and use a sun angle analyzer to investigate the effect of angle on area illuminated. The fraction of light on each square of the analyzer is then calculated... (View More)

The images and information in the slide show presentation are designed to give learners a better understanding of how ancient cultures observed and interpreted the apparent motions of the Sun in the sky, as well as modern studies of the Sun using... (View More)

How effective would solar cells be in any particular area of the United States? In this activity, students answer that question by analyzing graphs of incoming solar radiation. Students will download two solar radiation graphs, one based on latitude... (View More)

Audience: Middle school, High school
Materials Cost: Free

This is a unit in 6 sessions about the seasons on earth. Learners will investigate the reason for seasons on earth. They will look at the circular orbit of earth, year-long temperature and daylight hours across different latitudes, compare models of... (View More)

Audience: Middle school

This activity, effective outdoors or indoors, demonstrates how insolation is affected by latitude by using a pair of thermometers, each taped to some cardboard, placed outside on a sunny day. A globe can also be used, outdoors or indoors. Students... (View More)

Using a color chart, students will make observations outside during each of the four seasons. During each session, they will try to find as many colors as possible and record what they see. As a class they will make charts describing the colors they... (View More)

Keywords: Seasons

in this illustrated story, students learn about seasonal migration of hummingbirds as they are exposed to the scientific process. Students Anita, Simon and Dennis and the rest of Ms. Patel's class research when the hummingbirds have gone and when... (View More)

Keywords: Seasons; Graphic novel
Audience: Elementary school
Materials Cost: Free

In this activity, students will record a list of things they already know about hummingbirds and a list of things they would like to learn about hummingbirds. Then they will conduct research to find answers to their questions. Using their new... (View More)

This worksheet provides a pair of satellite world maps, showing vegetation in January and July, and has a series of questions guiding exploration of the similarities and differences in the two images. The activity is from Space Update, a collection... (View More)

This web page features a short essay about the equinox solar alignments of the pyramid of Kulkulkan at Chichen Itza. It can be used by educators as background information or as a reading assignment for learners.