20 question review

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Twenty Plus Questions

• Subject General Science

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PLATE TECTONIC 4A 4B
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
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Where would the boundary between the continental
and oceanic plates NOT be found?

• A. at a divergent mid-ocean ridge
• B. about 70 km inland from the beach
• C. where the water stops during low tides
• D. about 70 km from shore out in the ocean

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1. THE ANSWER ISgtgtgtgtgtgtgt

• D. about 70 km from shore out in the ocean

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How is the oceanic crust compared with
continental crust?

• A. older
• B. thicker
• C. more dense
• D. less volcanic

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ANSWER2

• C. more dense

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3. Which portion of Earths layer is rigid and
approximately 100 km thick?

• A. upper mantle
• B. Lithosphere
• C. Asthenosphere
• D. oceanic crust

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ANSWER 3

• B. lithosphere

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Which portion of Earths layer is plastic-like
and fluid?

• A. upper mantleB. lithosphereC.
  asthenosphereD. continental crust

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5. ANSWER

• C. ASTHENOSPHERE

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6. What layer in Earths mantle do plates slide
over?

• A. asthenosphereB. lithosphereC. upper
  mantleD. continental crust

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A. asthenosphere
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7. Which of these describes the lithosphere and
the asthenosphere?

• A. The lithosphere is rigid and immovable, and
  the asthenosphere is hot and flowing.
• B. The asthenosphere is rigid and immovable, and
  the lithosphere is hot and flowing.
• C. Both are hot inner layers of earth capable of
  bending and moving.
• D. Both are hard and rigid layers of earth close
  to the surface.

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A. The lithosphere is rigid and immovable,
and the asthenosphere is hot and flowing.
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8. Two plates composed of rock of similar density
meet along a convergentboundary. Which statement
describes what will happen where the two plates
meet?

• A. The plates will rub against each other,
  causing shearing and creating fault lines in the
  interior of the plates.
• B. The plates will collide with neither plate
  subducting, causing the crust to pile up and form
  a mountain range.
• C. The plates will collide, and the compression
  will heat the plates, causing some of the plates
  to melt and form volcanic mountains.
• D. The plates will rub against each other,
  causing one plate to subduct underneath the other
  plate and forming a deep trench along the
  boundary

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B. The plates will collide with neither plate
subducting, causing the crust to pile up and form
a mountain range.
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9. Which of these describes a cause of
lithospheric plate movement across the surface of
Earth?

• A. The plates are driven by bubbles from the
  boiling liquid of the asthenosphere.
• B. The plates floats on dense liquid material of
  the astehenosphere and are moved by tidal waves.
• C. The plates are driven across the surface by
  convection currents within the plastic rock of
  the asthenosphere.
• D. The plates move because they are attached to
  the solid rock of the asthenosphere and move with
  that rock.

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C. The plates are driven across the surface by
convection currents within the plastic rock of
the asthenosphere.
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10. To locate the epicenter of an earthquake, you
will need a seismogram from at least how many
different seismic stations?

• A. 2
• B. 3
• C. 4
• D. 5

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B. 3
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11. The Mariana Islands are an arc of volcanic
islands in the Pacific Ocean. Based on this fact
only, which is most likely to be true?

• A. Tectonic plates collide near the Mariana
  Islands.
• B. The Mariana Islands are larger than most
  islands.
• C. The Mariana Islands have a warm and wet
  climate.
• D. There is very little seismic activity near the
  Mariana Islands.

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A. Tectonic plates collide near the Mariana
Islands.
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12. Which is most responsible for movement of
the parts of Earths crust?

• A. currents in the mantle
• B. rotation of Earth
• C. eruption of volcanoes
• D. the gravitational pull of the moon

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A. currents in the mantle
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Relative to each other, by how much do continents
generally move?

• A. less than a tenth of a millimeter per year
• B. a few centimeters per year
• C. a few meters per year
• D. more than a kilometer per year

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B. a few centimeters per year
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14. Which statement is evidence of continental
drift?

• A. Today, the continents are separated and the
  life forms on each one are very different.
• B. The outlines of the continents seem to fit
  together like pieces of a jigsaw puzzle.
• C. At places where the continents may have been
  connected, the minerals, rocks, and fossils are
  very different in age and origin.
• D. The magnetic orientation of rocks formed
  during different periods and found on different
  continents does not vary.

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B. The outlines of the continents seem to fit
together like pieces of a jigsaw puzzle.
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15. Scientists theorize that continents are
constantly shifting because of the transfer of
heat energy from inside Earths crust. Based on
this theory, if the transfer of heat continues,
which can be expected to occur over time?

• A. Earths crust will get softer.
• B. Volcanic activity will decrease.
• C. Earths crust will become less stable.
• D. The continents will continue to move around

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D. The continents will continue to move around
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16. Which of these describes a divergent
boundary?

• A. Two continental plates moving away from each
  other, forming a rift valley
• B. Two oceanic plates rubbing against each other,
  forming a mid-ocean ridge
• C. Two continental plates colliding, forming a
  mountain range
• D. Two oceanic plates colliding, forming a
  volcanic arc

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A. Two continental plates moving away from each
other, forming a rift valley
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17. Which of these describes the outcome of the
collision between oceanic and continental crust?

• A. The two portions of crust will stop moving.
• B. The continental crust will subduct beneath the
  oceanic crust.
• C. The two portions of crust will slide past one
  another, side by side.
• D. The oceanic crust will subduct beneath the
  continental crust.

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D. The oceanic crust will subduct beneath the
continental crust.
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The diagrams below representseismograms of four
different earthquakes recorded at the same
station. The epicenter of which earthquake is
located closest tothe station?
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D.
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About 30 miles into Earth, the speed of seismic
waves increases. What does this change in speed
indicate about the material through which the
seismic waves are traveling?

• A. The waves travel from rock into metal material
• B. The waves travel from cool material into hot
  material
• C. The waves travel from solid material into
  liquid material
• D. The waves travel from a less dense material
  into a more dense material.

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D. The waves travel from a less dense material
into a more dense material.
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• 19. What is the cycle of heating, rising, cooling
  and sinking called?

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Convection Currents
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