108FirstTestbank[1]

108FirstTestbank[1] - CRISES OF A PLANET GEOL 108 FIRST...

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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. The terrestrial planets, including Mercury, Venus, Earth and Mars, are enriched in iron, magnesium, silicon, and oxygen relative to the larger more distant planets. Heating of the inner portions of Earth result from fusion of hydrogen atoms. Planet Earth had no atmosphere at the time of its formation. A sample from Saturn, if brought back to Earth, would be much heavier than any common Earth rock. The universe is expanding today. The Solar System is expanding today. 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". The internal energy within the Earth is derived from radioactive decay. It is reasonably certain that the initial crust of the Earth was of basaltic composition. The core, mantle, and crust of the earth were formed during its initial aggregation 4.7 billion years ago. The density of the outer planets is similar to that of water. 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. 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 The fluid motion of the outer core is the cause of the Earth's magnetic field. 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. The Earth's early atmosphere resulted from volcanic activity. The outer core of the earth  is mostly comprised  of molten  iron. Early earth  destroyed  its crust much  like is occurring  in the oceans today.  Life on Earth began  in a continental rift.  The core of the earth  formed  from impact of iron meteorites.  Water on planet Earth initially arrived  from comets.  Island arcs result from convergence of two ocean plates. Subduction zone earthquakes range in depth from shallow at the trench to several hundred kilometers beneath the overriding plate. 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. Heating of the inner portions of Earth result from fusion of hydrogen atoms. Although the average age of the Earth is 4.6 billion years (b.y.), rocks older than 4.6 b.y. occur in the continental interiors and rocks younger than 4.6 b.y occur on the continental margins. Pangea formed from a number of continental collisions leading to the formation of the Ural and
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108FirstTestbank[1] - CRISES OF A PLANET GEOL 108 FIRST...

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