Landslides often have devastating effects on humans. The wall of mud wipes out buildings, covers roads and changes the landscape. The economic cost of landslides in the United States ranges from $1 billion to $2 billion annually. NBC News reports a death toll of 41 individuals with two missing from the March 22, 2014, landslide in Oso, Washington.Know More
Many landslides are the aftereffects of volcanoes or earthquakes. The damage they cause is often more significant than the damage caused by the triggering event.
Both natural and human forces increase the likelihood of a landslide. Activity at the base of the incline, such as the cutting action of a river or excavation by humans, removes some of the supporting material, giving gravity a greater advantage at moving the sediment from the higher layer.
According to HowStuffWorks.com, geologists classify landslides as "mass movement," a term describing any kind of "gravity induced movement of sediment down a slope." While some mass movements occur slowly over several years, landslides often occur in a matter of minutes. Mass movements are sometimes small, as when a deer kicks a few rocks down an incline. Others are large, such as the 1980 landslide due to Mount St. Helens' eruption. From a technical point of view, a landslide is a specific type of mass movement in which sediment loosens from its underlying bedrock along a distinct line of weakness, separates and moves down a slope in a rapid fashion.Learn more in Earth Science
The Coriolis effect plays a role in the flight paths of airliners as well as the formation and movement of hurricanes. The Earth's rotation imbues winds and objects that travel through the atmosphere with angular momentum due to the fact that the earth spins faster at the equator than it does near the poles.Full Answer >
The rain shadow effect occurs as warm, moist air rises against high elevations of land and drops its water along the way. This creates a region on the far side of the mountain range that is relatively deficient in precipitation to the point of forming a rain-shadow desert.Full Answer >
The definition of a natural resource is something that is found in nature that is useful to humans. All natural resources are finite, meaning once they are used, they cannot be replaced. Many valuable natural resources, such as gold and oil, have been nearly depleted, while others are still abundant.Full Answer >
Mass movement, or mass wasting, has significant effects on humans, including loss of property, severe injury and death. This has become a larger problem as the human population grows and people have spread over more previously uninhabited land. The effects are also greater in underdeveloped countries that lack zoning laws, information and disaster preparedness.Full Answer >