The Oceania/Pacific region is comprised of many countries and thousands of islands. What are four characteristics of a typical island nation?
• Population 100,000 - 150,000
• Land area 250 - 1,000 square miles
• Consists of a number of islands
• Ex-colony of Britain, New Zealand, or Australia
• Depends heavily on foreign economic aid
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A moving object on which no forces are acting will continue to move with constant
A) acceleration. B) impulse. C) momentum. D) all of the above E) none of the above
How does convection cause the motion of plates that drives plate tectonics?
A) Convection blows the plates around the earth. B) Cold, dense lithosphere sinks, while hot, low-density mantle rises to the surface at hot spots C) Radiation of heat causes the plates to move, which in turn causes convection D) Refraction of heat from the sun heats the plates, causing convection and the motion of the plates.
Trenching across an active fault ____
A)releases pressure along the fault B)allows geologists to find evidence of previous earthquakes C)allows structures to be built to stop faulting activity D)diminishes the intensity of earthquakes E)produces secondary faults that reduce pressure on the major fault
Why is there salt in the oceans?
A. Precipitation B. Runoff from the continents C. Comets D. Melting of ice at the Poles