A Record of Climate Change

The hydrologic cycle is a very basic scientific principle. In this article, background information is presented on how the hydrologic cycle provides scientists with clues to understanding the history of Earth's climate. Also detailed is a web-based activity that allows students to learn about how scientists are able to piece together a record of Earth's climate thanks to a unique ice core drilling program in Greenland. (Contains 4 figures and 11 resources.)