We decided, for our Science Project, that we would learn about the Grand Canyon and its layers. It is located in Arizona and is one of the greatest natural wonders of the world that is around eighteen miles wide and nearly 280 miles long. The width and depth of the Canyon vary from place to place. At the South Rim, near Grand Canyon Village, it's a vertical mile, which is about 5000 feet from rim to river. The width of the Canyon at Grand Canyon Village is 10 miles from rim to rim; though in places it is as much as 18 miles wide.
             Another way to look at the enormous size is by the time a trip takes. From the bottom of the Canyon and back on foot is a two-day journey. Rim-to-rim hikers generally take three days one-way to get from the North Rim to the South Rim. A trip through Grand Canyon by raft can take two weeks or longer and experienced backpackers have spent weeks in the more remote areas of the Canyon.
             In 1975 the park was nearly doubled in size by the inclusion of Grand Canyon National Monument and Marble Canyon National Monument and portions of Glen Canyon and Lake Mead national recreation areas. The effects of tourism and federal water management policies led the government to take steps to protect the canyon's environment during the 1990s. In March 1996 a controlled flood through Glen Canyon Dam was generated as a way to re-create natural spring flooding through the canyon. The results of this led to a new water-management plan. This plan incorporates flooding to restore the canyon's natural ecosystems, which had been changed by the construction of Glen Canyon Dam in 1963. In 1997 the government restricted small planes and helicopters from flying over the canyon and was considering other ways to limit the effects of tourism on the park.
             The sites of the park are incredible with its beauty and mystery. One of the main attractions is the Colorado River, which is about 242,000 square miles of land ranging fr...