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Question
An echo sounder operates by measuring the time required for a ________.A) light beam to travel from a satellite at a known altitude to the sea bottom and back
B) radar beam to travel from a harbor patrol boat to a fuzz-buster on a speeding yacht
C) radar beam to travel from a ship to the seafloor and back
D) sound pulse travels from a ship to the seafloor and back
Answer
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Related questions
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A) coal
B) ice
C) helium gas
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A) reserve
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A) luster
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What does the tendency of micas to produce thin cleavage flakes suggest about its crystal structure?
A) The crystal structure is characterized by complex polymerized mats that form a sheetlike structure.
B) The structure is characterized by rings that form an interlocking network, forming planar sheets.
C) The structure is produced by flow in the igneous rock, aligning glass layers within the crystal structure.
D) The atoms are arranged in orderly arrangements that form strongly bonded sheets separated by weak bonds between the sheets.
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Use the Periodic table below to answer the following questions: When electrons are shared amongst all atoms, the resulting bond is a(n) ________ bond.
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Use the Periodic table below to answer the following questions: Element 20, Ca, has what chemical property?
A) It behaves as a metal ion, giving up two electrons to form a +2 ion.
B) It tends to form covalent bonds and an ion with a charge of +1.
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D) It tends to be inert, and thus is dispersed throughout the crust.
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B) innermost electron shell because the electrons can be transferred to the nucleus
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D) Any electron can exchange with adjacent atoms to form a bond; there is no preference.
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B) heat from Earth's interior
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B) positive feedback mechanisms
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A) deep-ocean trenches
B) oceanic ridges
C) seamounts
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B) flat areas that include rocks older than 1 billion years old
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A) along coastlines
B) near desert regions
C) in the interior of continents
D) in areas that receive large amounts of rainfall
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A) viscosity
B) temperature
C) density
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B) sea floor spreading
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B) Asthenosphere
C) Lower mantle
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A) hot spots on the sea floor, like Iceland
B) spreading ridges
C) convergent plate margins
D) transform plate margins