GEO 103 Module 1 – Flashcards
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The nebular theory is the most widely accepted view of the origin of our solar system. Which of the following is a short description of the nebular theory?
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A large cloud of space gas and dust condensed and contracted to form a rotating disk with a star formed at the center. Repeated collisions caused bodies to coalesce, leading to the current configuration of our solar system
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The enormous cloud of gas and dust initially condensed due to particle attraction. What force then pulled the cloud into a flat disk shape?
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The inward pull of gravity.
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What object or class of objects makes up the most of the solar system's mass?
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The Sun
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Through the course of time, bodies in our solar system have become __________ and __________ due to collisions.
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fewer in number; larger in size
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The Colorado River has carved the Grand Canyon to a depth of __________ and length of __________.
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1 mile; 277 miles
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What kind of geologist studies fossils?
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a paleontologist
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What does the Great Unconformity represent?
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the billion years of Earth history from which there are no evidential rocks at the Grand Canyon
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Why do scientists collect data?
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to prove or disprove a hypothesis
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Which one of the following is true regarding the effects of Glen Canyon Dam on the Grand Canyon?
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The dam traps sediment that previously had been carried downstream.
