A natural disaster is defined as A natural event that causes severe loss of life and property damage Which continent has had the most casualties from natural disasters over the past 40 years Asia Hazardous natural events occur most often in Both underdeveloped and developed countries are impacted by natural disasters The occurrence of hazards is not related to human interaction faulse Areas of cities that are subjected to significant natural hazards should be used for which of the following parks and golf courses When people or government agencies try to control the activities of natural events the common result is which of the following Our problem with nature is transferred elsewhere to someone else or postponed An insurance company decides on the cost of a policy for a natural hazard by calculating the cost of the probable loss times the probability of that loss The costs of catastrophic events continue to increase primarily because more people are moving into more hazardous areas What is the normal relationship between number of a particular type of event and the size of such events There are many small events a moderate number of larger events and few giant events of any given type Location is one of the criteria used in predicting a natural disaster true Recurrence Interval Is the expected time interval between a hazard of a given magnitude An area that has been hit by a natural disaster is usually not likely to have another one in the future faulse When is a large event such as a major earthquake not a disaster when it happens in an area without any people Earthquakes can often cause other disasters such as a tsunami or landslide true When people incur a significant loss from a natural disaster who is most commonly to blame The people themselves for choosing to live there What can happen to make a moderate size event into a large natural disaster overlapping events that amplify the effect If you erect a barrier for protection against some natural event what detrimental effect can follow It can have detrimental effects on others nearby are actions taken to reduce or eliminate the effects of natural events on people and property Mitigation What is the difference between a reactive response and an anticipatory response A reactive response has to do with recovery while an anticipatory response has to do with preparedness The emergency phase of the general recovery model following catastrophic events Includes clearing of roads for emergency vehicles and the search and rescue of victims Most people do not recognize the signs of imminent catastrophes because these events are infrequent true involves restrictive zoning and the abandonment and public use of hazardous areas land use planning the commonly accepted hypothesis for the formation of the Earth is the gravitational accretion of a cloud of gas ice and solid debris Which of the following was not a source of heat energy in the early years of earth s existence magnetic energy Which of the following two elements form the basic building block of MOST minerals in the earth s crust Si and O What is the proper sequence of the layers of the earth if they are listed from least dense to most dense crust mantle core What is the difference between the Earth s lithosphere and asthenosphere Lithosphere is more rigid asthenosphere is more plastic easily deformed The earth s active tectonic plates are composed of the earth s crust and upper mantle Of the following which was NOT used by Wegener as evidence to support his theory of continental drift Paleomagnetism of the rock of the ocean floor What was the main reason why Wegener s ideas of continental drift wer refected by many scientists He could not provide a viable mechanism for movement of the continents How did sea floor spreading revive Alfred Wegener s ideas about continental drift Sea floor spreading presented a viable mechanism for moving the continents Sea floor spreading is a conveyor belt like process where Young oceanic crust is formed in the center of ocean basins by magma The driving mechanism thought to provide the power for movement of the lithospheric plates is Convection currents within the mantle powered by heat generated from radioactive decay and the original heat of the earth Moving away from mid ocean ridges the seafloor volcanic rocks Become progressively older The size of our planet is increasing because of plate movement False If the Atlantic Ocean floor is getting wider why is the Earth not becoming larger Old ocean floor sinks at subduction zones trenches Seafloor spreading was confirmed in the mid 1960s by observing The magnetization of rocks of the ocean floor Why do many oceanic volcanoes occur as long lines of volcanoes that are active at only one end The lithosphere moves over a stable hotspot in the mantle Rift valleys are areas of the Earth where Lithospheric plates diverge Which is an example of a divergent boundary mid ocean ridge Which of the following features develop where plates converge and one descends into the mantle A trench When an oceanic plate collides with a continental plate The oceanic plate is subducted under the continental plate Why does oceanic lithosphere almost always sink beneath continental lithosphere at convergent plate boundaries Oceanic lithosphere is denser than continental lithosphere Which of the following would be considered a volcanic arc formed by subduction of oceanic crust beneath oceanic crust ocean ocean convergent boundary Japan Which best describes Mount St Helens and the other Cascade volcanoes of the North American northwest Volcanoes built on a continental margin above a sinking slab of oceanic lithosphere The largest mountain ranges such as the Himalayas are formed at Continent continent convergent boundaries Which of the following is a true statement about transform boundaries The relative motion of plates at a transform boundary can cause earthquakes The San Andreas fault at the boundary between the North American Plate and the Pacific plate is a Transform boundary formed by the two plates sliding past each other What does plate tectonic theory predict about the distribution of volcanoes and earthquakes They should occur primarily along plate boundaries Three settings where volcanoes generally form are subduction zones hot spots mid ocean ridge systems In the 1997 movie volcano there is a violent eruption in Los Angeles California This is not realistic because this area is cut by a transform boundary which
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