geology

Introduces the variety of land formations on Earth, from deserts to mountains to canyons, and describes how they are formed; visits Kenai Fjords National Park in Alaska to show land formations created by glaciers; and presents a hands-on demonstration of moving water's impact on the earth's surface.

Darwin's notes from his 1831 trip provide an account of the HMS "Beagle" and the first hints of his theory of evolution and natural selection.

Brief text and color photographs introduce some of nature's phenomena such as volcanoes, glaciers, wind and water erosion, rainbows, and fog.

"Ari, Jenna, and Caleb unlock the secret of time travel and journey back 15,000 years to witness the great Missoula Floods, the largest floods to have ever washed over the face of the earth"--Publisher description.

After Ari discovers a time map of the Colorado Plateau, he and the twins travel from the watery beginnings of the Earth to the Cretaceus Period. Unfortunately, other time travelers have learned their secret and are determined to get their hands on that map and the resources it reveals.

Text and photographs discuss the evolution of the earth from the "birth" of the planet to geological formation of the continents and the development of the atmosphere and climate.

Presents projects and activities that explore many aspects of the science of geology.