p.98

Ball State University
Take a virtual tour of the Janet Annenberg Hooker Hall of Geology, Gems, & Minerals-the largest exhibition hall in the Smithsonian National Museum of Natural History. Afterwards,
describe your favorite gem in your Science Journal.
p.105

Igneous
Rocks
Visit this site to view different igneous rocks and find out more about their origins. What type of igneous rock is closely related to granite? What is different about these two
rocks?
Volcano World
An erupting volcano is an awesome sight to behold. Study photographs of explosive eruptions, then draw a world map showing the location of at least five active volcanoes.
Willow
Grove School, Buffalo Grove, Ill.
Minerals can be classified according their hardness, color, luster, cleavage, or appearance. Make a table listing the characteristics of four different minerals.
The
Center for Improved Engineering and Science Education
Clean water may be our most precious resource. Join students and scientists in a global effort to monitor the quality of rivers, oceans, lakes, and streams.
Environmental Protection Agency
Wetlands are important habitats for many species. Call the Wetlands Hotline to learn more about government programs to protect these areas.