At this site students can explore scientific data on climate change relating to the atmosphere, the oceans, the areas covered by ice and snow, and the living organisms in all these domains. They will get a sense of how scientists study natural phenomena, how researchers gather evidence, test theories, and come to conclusions. Though climate change is not new, the study of how human activity affects the earth's climate is. Links lead to five major sections: atmosphere, hydrosphere, cryosphere, biosphere, and global effects. Each section is a separate lesson consisting of visual thumbnails with supporting text. All sections are supported by a glossary. Educational levels: High school, Middle school, Undergraduate lower division