108FirstTestbank

108FirstTestbank - Test Bank Answers CRISES OF A PLANET...

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Test Bank Answers 16/09/2005 18:32:00 CRISES OF A PLANET - GEOL 108 FIRST TEST BANK (example questions) TRUE/FALSE (2 points each) The Earth never experienced the same heavy meteorite cratering of the moon at 4.5 to 4.7 b.y. because most of meteorites were burned up in the thick atmosphere. True The terrestrial planets, including Mercury, Venus, Earth and Mars, are enriched in iron, magnesium, silicon, and oxygen relative to the larger more distant planets. True Heating of the inner portions of Earth result from fusion of hydrogen atoms. False Planet Earth had no atmosphere at the time of its formation. True A sample from Saturn, if brought back to Earth, would be much heavier than any common Earth rock. False The universe is expanding today. True The Solar System is expanding today. False The age of light coming to earth from the most distant regions of the universe dates back to about 12 to 14 b.y. ago, the estimated age of the "Big Bang".
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True The internal energy within the Earth is derived from radioactive decay. True It is reasonably certain that the initial crust of the Earth was of basaltic composition. True The core, mantle, and crust of the earth were formed during its initial aggregation 4.7 billion years ago. True The density of the outer planets is similar to that of water. True The residual high temperatures left from the Earth's initial accretion caused internal melting and segregation to begin the process of differentiation forming core, mantle, and crust. True The concept of the hydrologic cycle implies that most water is of magmatic origin, with the principal cycling occurring at the ocean ridges and subduction zones True The fluid motion of the outer core is the cause of the Earth's magnetic field. True Ocean crust only appears to be made of rocks less than 200 million years in age as all older crust is buried under a thick layer of abyssal mud. False The Earth's early atmosphere resulted from volcanic activity. True The outer core of the earth is mostly comprised of molten iron. True 2
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Early earth destroyed its crust much like is occurring in the oceans today. True Life on Earth began in a continental rift. True The core of the earth formed from impact of iron meteorites. True Water on planet Earth initially arrived from comets. True Island arcs result from convergence of two ocean plates. True Subduction zone earthquakes range in depth from shallow at the trench to several hundred kilometers beneath the overriding plate. True Ocean crust only appears to be made of Mesozoic or younger rocks as all older crust is buried under a thick layer of abyssal mud. False
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This note was uploaded on 10/25/2008 for the course GEOL 108 taught by Professor Anderson during the Fall '06 term at USC.

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108FirstTestbank - Test Bank Answers CRISES OF A PLANET...

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