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OCN EXAM 2 QUESTIONS AND ANSWERS 2023
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Exam of 15 pages for the course OCN at OCN (OCN EXAM 2)
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OCN EXAM 2Which of the following feature(s) is/are associated with the mid-ocean ridge?
Choose all that apply. - answer Volcanoes
central rift valley
Basalt volcanism and pillow lavas
Hydrothermal vents
The explorer who advanced oceanography by introducing systematic soundings, or
depth measurements, was __________. - answer James Cook
The important contribution to navigation made by Eratosthenes in the third century BCE
was ____ - answer reasonably accurate calculation of the circumference of our
planet
The largest geographic feature on the surface of Earth is __________. - answer the
Pacific Ocean
Earth's current atmosphere supports animal life because __________. - answer
plant photosynthesis provides oxygen that is critical for aerobic respiration
Which of the following statements is supported by the nebular hypothesis regarding the
formation of our solar system? - answer The Sun became a star when its
temperature and density became so great that nuclear fusion began.
The lithosphere consists of Earth's ______ - answer crust and uppermost mantle
The water in Earth's oceans most likely came __________. - answer dominantly
from volcanic outgassing with small contributions from comets
Stanley Miller's famous experiment demonstrated that __________. - answer organic
molecules could be produced from the mixture of gases comprising Earth's early
atmosphere
According to the geological time scale, which selection lists the correct order of
coexistence, from earliest to latest? - answer Trilobites and amphibians, insects and
dinosaurs, dinosaurs and birds, flowering plants and fishes, humans and reptiles
In science, which one of the following would be considered an observation? Select only
one answer. - answer Waves approach the beach at an angle.
, Which of the following would best describe the principal goal of science? Select only
one answer. - answer To explain the causes and effects of observable natural
phenomena
Of the following statements related to the formation of a density-stratified Earth, which
is/are true? - answer 1. Rocky material of the mantle is less dense than the liquid
outer core.
2. Molten material will rise if it is less dense than the surrounding material.
3. The layer with the greatest density is located at the center of Earth.
Of the following statements about the internal structure of Earth, which is/are true? -
answer 1. The magnesium-silicate rocks of Earth's mantle exist in both solid and
molten form.
2. The mesosphere and the asthenosphere have the same chemical composition.
Basalt is associated with oceanic crust. - answer
Based on the concept of isostatic adjustment, which of the following would result in the
uplift of Earth's surface? - answer 1. Lithosphere that was thickened by mountain
building
2. Lithosphere that was made to be less dense
3. Lithosphere that was heated by hot asthenosphere
Which of the following ideas support our current scientific understanding of the
development of life on Earth? - answer As life evolved it significantly changed Earth's
environment.
The "prebiotic soup" of the primitive oceans provided favorable conditions for life to
develop.
Primitive life likely existed without the need for oxygen.
Early organisms evolved into more complex organisms over geologic time.
earth early atmos had no oxygen - answer
Evidence shows that periodic reversals of Earth's magnetic field have resulted in
__________. - answer a symmetrical pattern of normal and reverse magnetization in
ocean crustal rocks
Earthquakes can occur only in the _________ - answer lithosphere
Numerous small, shallow earthquakes tend to occur at __________. - answer
divergent plate boundaries
Iceland is located on what type of plate boundary? - answer divergent
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