The large geophysical globe turns slowly to reveal mid-ocean ridges, deep sea trenches, and bands of continental mountains. The new and unifying theory of plate tectonics interprets these and other surface features as products of the movement of some 12 major and many smaller plates that ride in slow motion upon the molten rocks beneath the earth's crust. Exhibits illustrate how this movement promotes constant shifts in the earth's topography by causing mountain-building, volcanoes, and earthquakes. The Earthquake exhibit allows visitors to experience an earthquake through sound and video, try constructing an earthquake-proof building, and quiz themselves to see if they are ready for the big one. For those interested in rocks and minerals, the Gem and Mineral Hall offers a variety of exhibits, including displays of basic rock types, the physical and optical properties of minerals, and handsome gemstone samples.
Visitors learn about crystal formation by observing large crystal models suspended from the ceiling.
Hundreds of minerals, many of them beautiful and some extremely valuable and useful to man, are displayed systematically for the curious observer to enjoy and identify. Solar system or stars, rocks or rotation, the earth or its earthquakes - the Academy's Earth and Space Science exhibits promise to hold and strengthen your interests. A docent tour of Earth and Space Science exhibits focuses on many of the subjects outlined below. The degree of detail depends on the interests and learning level of each group. Most students find the tour more rewarding if these subjects and the listed vocabulary are discussed in class prior to your visit to the Academy.