Name: 
 

SolidEarth



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

 1. 

.  Which kind of waves can pass through gas, liquid, AND the Earth's core:
a.
P waves
c.
Love waves
b.
S waves
d.
Rayleigh waves
 

 2. 

Who first developed the theory of continental drift?
a.
J.A. Wilson
c.
Herman Hesse
b.
Alfred Wegene
d.
Harry Hess
 

 3. 

What is it called when one plate is driven beneath another?
a.
subduction
c.
subsidence
b.
subtraction
d.
sea floor spreadin
 

 4. 

What is Geophysics?
a.
a way of drilling for oil.
d.
none of the above
b.
a branch of geology that uses indirect techniques to deduce the composition of the earth.
e.
b and c are both correct
c.
a branch of physics centered around the earth
 

 5. 

Which is denser, continental crust or oceanic crust?
a.
Continental
c.
They are the same
b.
Oceanic
d.
They are constantly changing
 

 6. 

Who coined the term “seafloor spreading”?
a.
Harold Hess
c.
Albert Eisenstein
b.
Alfred Wegener
d.
Robert Oppenheimer
 

 7. 

Which type of magma is more likely to cause an explosive eruption?
a.
Basaltic
c.
Felsic
b.
Mafic
d.
Andesitic
 

 8. 

What provides a unifying theme upon which we can understand very wide arrays of processes that are taking place in the earth's crust?
a.
The Theory of Evolution
c.
The theory of volcanic hot spots
b.
Plate Tectonics Theory
d.
Rock divergence theory.
 

 9. 


Geophysicists employ which of the following methodology to develop a better understanding of the earth’s interior?
a.
Utilize high-tech equipment to drill deep into the earth’s upper mantle and gather samples in order to better understand its geological make-up.
d.
Both ‘b’ and ‘c’
b.
Use computer and laboratory models to simulate conditions deep within the earth.
e.
All ‘a’ , ‘b’, and ‘c’
c.
Analyze variations in the earth’s temperature, magnetic field, and gravity.
 

 10. 

Continental crust is between____ km thick, while oceanic crust is between ___ km thick:
a.
25-70 km; 5-10 km
c.
55-70 km; 80-95 km
b.
5-10 km; 25-40 km
d.
80-95 km; 55-70 km
 

 11. 

What is Oceanic crust primarily composed of?
a.
Iron magnesium silicates
c.
Aluminum silicates
b.
Iron oxides
d.
Potassuim silicates
 

 12. 


The seafloor becomes _____ the further it moves from mid-ocean ridges.
a.
older
c.
hotter
b.
younger
d.
less dense
 

 13. 

 
Which of the following helped showed that continental drift exists?
 
a.
Plant fossils
d.
Areas of ancient rock 
b.
Climate zones
e.
All of the above
c.
placement of  mountain ranges
 

 14. 

Geologists think that that the Earth experiences a reverse in magnetic polarity approximately every______________years, and that the last such reversal might have taken place________________years ago.
a.
700,000/ 500,000
c.
500,000/ 700,000
b.
1 Million/ 700,000
d.
1 Million/ 500,000
 

 15. 

Over the last 100 years, the Earth’s magnetic field has__________
a.
Gotten stronger
c.
Maintained a constant rate
b.
Gotten weaker
d.
Fluctuated
 



 
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