The purpose of this resource is to determine the latitude, longitdue, and elevation of your school and of all your GLOBE sites. The GPS receiver will be used to determine the latitude, longitude and elevation of your school or of your GLOBE sites. Full description.

This activity will help clarify to students that the seasons are created by changes in the tilt of the earth as it revolves around the sun, not by changes in the earth's distance from the sun. Using a light and a globe or ball, they will walk around the light to simulate the earth's orbit around the sun, making sure to keep the 'earth' tilted toward a specific wall of the classroom. They will observe ... Full description.

In this activity, students examine graphs of solar radiation for various times of the year to see how the length of the day changes throughout the year. It can be used as a follow-up activity to the preceeding activity, 'The Seasons'. After examining the 12 graphs, which are presented in random order, they are asked which one represents which month of the year, and to explain their rationale. Full description.

In this activity, students will investigate the weathering of rocks by chemical processes. They will use effervescent cleansing tablets as a model for rock, and vary surface area, temperature, and acidity to see how rapidly the "rock" dissolves. This investigation will help them understand three of the factors that affect the rate of chemical weathering and develop better understanding of how to design ... Full description.