In this activity about the Sun's influence on plant growth, learners will create a plant box and observe that a plant will grow towards the Sun, its primary source of energy. By periodically collecting data on the growth of the plant, they can come... (View More) to their own conclusions about why the plant grew towards the sunlight. One to two weeks are needed to grow plants for this lesson; also, time is needed to construct the plant box. Potting soil and bean seeds are needed for this activity. (View Less)

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) and compared. A discussion at the end relates the results to the amount of sunlight falling on different parts of the Earth and the effect this has on temperature and seasons. Reprinted with permission from the Great Explorations in Math and Science (GEMS). (View Less)

This is an activity about the measurement of time. Learners model the rotation of Earth over one day by holding a flashlight for the Sun and a blow up globe, and record their observations. Then, they use those observations to create devices that... (View More) will track time and test their devices outside. This final part of this activity requires access to a sunny outdoor location for an extended period of time so learners can test their time measurement devices. (View Less)