Name:     ID: 
 
Email: 

Pangaea and Seafloor Spreading

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

 1. 

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

 2. 

Which type of crust is made mostly of basalt?
a.
oceanic crust
c.
continental crust
b.
aesthenospheric crust
 

 3. 

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.
the Glomar Challenger
c.
fishing nets
 

 4. 

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

 5. 

Continental crust is made mostly of two kinds of rock.  They are
a.
basalt and igneous
c.
granite and basalt
b.
rocks and granite
d.
lithospheric and metamorphic
 

 6. 

Which of the following makes up most of the Earth's mass?
a.
mantle
c.
inner core
b.
crust
d.
outer core
 

 7. 

The thinnest part of a tectonic plate lies beneath
a.
a coastal plain.
c.
the middle of the ocean.
b.
the center of a continent.
d.
a mountain range.
 

 8. 

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

 9. 

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

 10. 

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

 11. 

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

 12. 

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

 13. 

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

 14. 

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 seismic boundry
b.
the lithosphere
d.
the mohorovicic discontinuity
 

 15. 

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

 16. 

Who was the scientist that helped prove that Wegener was right about Pangaea with his theory of Sea Floor Spreading?
a.
Enyaw Ekrub
c.
Harry Hess
b.
Nicholas Copernicus
d.
Alfred E Neuman
 

 17. 

The scientific name for the crust is the
a.
continental crust
c.
lithosphere
b.
aesthenosphere
d.
mantle
 



 
         Start Over