Tectonics Quiz Prep

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Tectonics Quiz Prep
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• Simply put, what is the theory of plate tectonics
  ?

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• The earths crust is made up of plates that are
  moved around by convection currents in the mantle.

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• The outer layer of the Earth, the CRUST is what?
• Solid, liquid, like putty

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• SOLID

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• The second layer of the Earth, the MANTLE is
  what?
• Solid, liquid, like putty

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• Like Putty. It is hard like a solid, but it will
  flow in currents.

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• The 3rd layer of the Earth, the OUTER CORE is
  what?
• Solid, liquid, like putty

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• LIQUID - Mostly Iron Nickel

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• The LOWEST layer of the Earth, the INNER CORE is
  what?
• Solid, liquid, like putty

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• SOLID - -
• The Metal is squeezed together so tightly that
  the molecules cant move

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(No Transcript)
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• What part of the earth moves the outer plates?

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• The mantle is flowing in currents and moves the
  plates that float on top of it

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• What energy transfer method causes the mantle to
  flow?

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• CONVECTION

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• Where does the heat come from that heats the
  mantle and causes its convection currents?

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• The super HOT outer and inner core provide the
  heat for mantle convection currents

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• What is a divergent boundary?

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• 2 plates moving apart

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Divergent Boundary
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• What is a convergent boundary?

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• 2 plates moving together

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Convergent Boundary
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• What is a transform boundary?

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• 2 plates sliding past each other like 2 trains on
  parallel tracks

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(No Transcript)
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• What is a subduction zone?

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• The place where one plate is sliding under
  another in a convergent boundary

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Subduction Zone
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• How fast do the plates usually move?

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• Usually only a centimeter or 2 per year, but
  India is clocked at 20 cm/yr

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• Where is a convergent boundary?

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• Washington and Oregon

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• What type of boundary is a subduction zone
  associated with?

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• Convergent

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• Where is a transform boundary?

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• Much of the coast of California

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• Where is a Divergent boundary?

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• The riff valley in Ethiopia

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• How do we know Pangaea really existed?

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• Coal in Antartica
• The shapes of the continents
• Identical fossils around the world
• Identical rocks around the world

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CLOSE OR FAR?
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• What is one thing a seismograph tells us?

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• Distance to the epicenter

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• What is the other thing a seismograph tells us?

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• How strong the earthquake is

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• What is the focus and the epicenter of an
  earthquake?

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(No Transcript)
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• How many seismographs do we need to know exactly
  where an earthquake is located?

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• 3

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CLOSE OR FAR?
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• What is it called when we use 3 seismographs to
  determine the location of a quake?

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• TRIANGULATION

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What is the amplitude?
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How long does it take the S wave to arrive at the
seismograph?
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• Complete the sentence
• The longer it takes the S wave to arrive, the
  ___________________.

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• .further it is to the quakes epicenter.

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• What does high amplitude mean about the quake?
• It is either -------

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• .. Very Big, or very Close.

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• What is an island arc?

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Island Arc

• A string of volcanic islands, usually in the
  shape of an arc

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Island Arc

• What causes an island arc to form?

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Island Arc

• Subduction Zones at the front of convergent
  plates cause the volcanoes of an island Arc to
  form.

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Island Arc
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• What is an Ocean Trench?

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Ocean Trench

• A deep trench in the ocean floor caused by
  convergent plates with a subduction zone

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Ocean Trench
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• Will this quiz be open note?

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• Maybe
• Bring your Notes

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• GOOD LUCK!