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Pangaea and Plates

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
The outermost, rigid layer of the Earth is called the
a.
mesosphere.
c.
asthenosphere.
b.
lithosphere.
d.
outer core.
 

 2. 
Which layer of the Earth is made up of tectonic plates?
a.
core
c.
asthenosphere
b.
mesosphere
d.
lithosphere
 

 3. 
Earth's oceanic crust is ____ than the continental crust.
a.
thinner but denser
c.
thicker but less dense
b.
thicker and denser
d.
thinner and less dense
 

 4. 
The part of the Earth on which the tectonic plates are able to move is the
a.
lithosphere.
c.
mesosphere.
b.
asthenosphere.
d.
subduction zone.
 

 5. 
This is a boundary between the crust and the mantle.  Seismic waves change speeds as they pass through this area.
a.
the asthenosphere
c.
the lithosphere
b.
the mohorovicic discontinuity
d.
the seismic boundry
 

 6. 
Scientists have used drilling equipment to drill a hole down into the Earth’s
a.
mantle
c.
crust
b.
aesthenosphere
d.
moho
 

 7. 
The crustal plates of Earth move due to being dragged along with
a.
convection currents in the mantle.
c.
the high tides of the oceans.
b.
the rotation of Earth on its axis.
d.
prevailing winds in the jet stream.
 

 8. 
What is the primary cause of volcanoes and earthquakes?
a.
crustal plate movement
c.
higher than usual tides
b.
Earth's gravitational force
d.
solar magnetic storms
 

 9. 
What landform is created when two continental plates collide?
a.
mountain range
c.
volcano
b.
ocean basin
d.
canyon
 

 10. 
If we compare the temperature and pressure of the Earth's mantle to the core, what differences can we expect as we move downward into the Earth?
a.
Both the temperature and pressure increase.
b.
Both the temperature and pressure decrease.
c.
The temperature decreases and the pressure increases.
d.
The temperature increases and the pressure decreases.
 

 11. 
The ancient continent that contained all the landmasses is called
a.
Pangaea.
c.
Laurasia.
b.
Gondwana.
 

 12. 
In the 1940’s and 1950’s, scientists began using __________ to map the ocean floor.
a.
laser beams
c.
sound waves
b.
radar
 

 13. 
What actually causes the continents to move?
a.
the coriolis effect
c.
the Earth’s rotation
b.
seafloor spreading
 

 14. 
Wegener believed that the continents originally broke apart about ____ years ago.
a.
200 million
c.
400 million
b.
300 million
 

 15. 
The world’s longest chain of mountains is the
a.
Andes Mountains
c.
Rocky Mountains
b.
mid-ocean ridge
 

 16. 
The youngest rocks are found
a.
far away from the mid-ocean ridge
c.
on the continents
b.
near the mid-ocean ridge
 

 17. 
What was used to discover that the youngest rocks were near the mid-ocean ridge?
a.
ropes lowered by hand from the HMS Beagle
b.
fishing nets
c.
the Glomar Challenger
 

 18. 
mc018-1.jpg
What kind of boundary is this?
a.
transform boundary
c.
convergent boundary
b.
divergent boundary
 

 19. 
mc019-1.jpg
Why is there a volcano on this boundary?
a.
caused by the plates crashing together
c.
it is on a transform boundary
b.
it is above a subduction zone
d.
most mountains are volcanoes
 

 20. 
mc020-1.jpgWhat kind of boundary is this?
a.
transform
c.
convergent
b.
divergent
 

 21. 
mc021-1.jpg
What type of boundary is this?
a.
transform
c.
convergent
b.
divergent
 

 22. 
mc022-1.jpg
What kind of boundary is this?
a.
transform
c.
convergent
b.
divergent
 

 23. 
mc023-1.jpg
What does letter A represent?
a.
a divergent boundary
c.
a subduction zone
b.
the moho
 

 24. 
mc024-1.jpg
Which layer has the greatest temperature and pressure?
a.
lithosphere
c.
outer core
b.
mantle
d.
inner core
 

 25. 
Why does oceanic crust sink below continental crust?
a.
oceanic crust is less dense
c.
continental crust is denser!
b.
oceanic crust is denser
d.
oceanic crust contains more granite
 



 
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