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Exam of 4 pages for the course tgmt at tgmt (ESCI QUIZ REVIEW)
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ESCI QUIZ REVIEWThe boundary between oceanic and continental lithosphere (crust) at a passive margin
is marked by: - answerThe continental slope
Within Earth's mantle, convection cells move lithospheric plates toward ____ and away
from ____ - answersubduction zones; spreading centers
Multibeam echo sounders radiate multiple beams of sound pulses to give a larger
coverage pattern on ocean floors compared to the original single echo sounders. -
answerTrue
Spreading centers at the Mid-Atlantic Ridge spread at a faster rate than those at the
East Pacific Rise. - answerFalse
Passive margins are also referred to as ____. - answerAtlantic type
What is a typical characteristic of passive margins? - answerBroad continental shelf
What feature distinguishes a guyot from a seamount? - answerFlat top
Where is the deepest region in the ocean? - answerMariana Trench
Hydrothermal vent fluid is typically above 450°C - answerFalse
What are the four main layers of oceanic crust? - answersediments, pillow basalts
(lavas), sheeted dikes, gabbros
Gravitational force was too weak to retain water - answerMars
Had the right size and distance from the sun to retain water - answerEarth
Water molecules reached high altitudes and eventually escaped - answerVenus
Which is true about Venus? - answerVenus cannot remove CO2 from the atmosphere
without water
Lord Kelvin estimated the age of Earth to be 20-40 million years. Which of the following
is true? - answerKelvin estimated how long it would take a molten planet to cool down to
the observed temperatures
What facts and knowledge did Eratosthenes have in calculating the size of Earth? There
may be more than one. - answerThe Sun shone directly above a deep well
He knew the distance between the well and the "slight" shadow
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