Which of the following mass movements poses the greatest risk to human life a slump a mudflow or an Earthflow?
Mudflows, earthflows and slumps can be all dangerous. However, the most dangerous are mudflows. The reason lies in the fact that mudflows can activate very fast, they can cover greater distances, they can carry a lot of debris which was triggered by heavy rainfall or snow melting.
What is the force behind mass movements?
Gravity is the main force responsible for mass movements. Gravity is a force that acts everywhere on the Earth’s surface, pulling everything in a direction toward the center of the Earth.
Which is one of the most dramatic triggers of sudden mass movements?
Cards
| Term what is mechanical weathering | Definition the physical disintegration of rock, resulting in smaller fragments |
|---|---|
| Term one of the most dramatic triggers of sudden mass movements is a(n) | Definition earthquake |
During what season would you expect mass movements to be a greater threat?
Climate. During what season would you expect mass movement to be a greater threat? A wet spring before vegetation is growing.
What are the effects of mass movement?
Mass movements affect the following elements of the environment: (1) the topography of the earth’s surface, particularly the morphologies of mountain and valley systems, both on the continents and on the ocean floors; (2) the character/quality of rivers and streams and groundwater flow; (3) the forests that cover much …
Which type of mass movement happens very slowly?
Creep is a very slow mass movement that goes on for years or even centuries. You can’t see creep happening but leaning fences and poles and broken retaining walls show where it has taken place.
Which type of mechanical weathering is most common in mountainous regions in the middle latitudes?
Ice wedging is common in Earth’s polar regions and mid latitudes, and also at higher elevations, such as in the mountains. Abrasion is another form of mechanical weathering. In abrasion, one rock bumps against another rock.
Which of the following factors commonly trigger mass movements?
Among the factors that commonly trigger mass movements are saturation of surface materials with water, oversteepening of slopes, removal of vegetation, and earthquakes.
Which mass movement is the fastest?
Landslides and avalanches can move as fast as 200 to 300 km/hour. Figure 3. (a) Landslides are called rock slides by geologists. (b) A snow avalanche moves quickly down slope, burying everything in its path.