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Layers Quiz

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

 1. 

Which layer of Earth is the densest and made mostly of nickel and some iron?
a.
crust
c.
core
b.
mantle
d.
lithosphere
 

 2. 

Which technology do scientists use to study the inside of the Earth?
a.
Geiger Counters
c.
seismographs
b.
telescopes
d.
radar
 

 3. 

What two things increase as we go deeper and deeper into the Earth?
a.
the types of rocks
c.
the number of elements
b.
the amount of oxygen and silicon
d.
temperature and pressure
 

 4. 

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

 5. 

The thickest part of the crust lies below
a.
the center of a continent.
c.
the middle of the ocean.
b.
a coastal plain.
d.
a mountain range.
 

 6. 

mc006-1.jpg
Which layer is the densest?
a.
A
c.
C
b.
B
 

 7. 

Why is the inner core a solid?
a.
it is made of different elements than the outer core
c.
the temperature is cooler than the outer core
b.
the tremendous pressure caused by the weight of the Earth forces it to be a solid
d.
it has less pressure than the mantle
 

 8. 

Scientists believe that the Earth's core is made mostly of
a.
oxygen.
c.
aluminum.
b.
iron and nickel
d.
magnesium.
 

 9. 

There are two kinds of crust
a.
basaltic and oceanic
c.
oceanic and continental
b.
dense and less dense
d.
molten and rocky
 

 10. 

Why does continental crust float on top of the mantle?
a.
the crust is separated from the mantle by a layer of water
c.
the crust is less dense than the mantle
b.
the crust is made of oxygen which is a light element
d.
the crust is more dense than the mantle
 

 11. 

What is the gooey, upper part of the mantle called that the plates of the lithosphere slide upon?
a.
asthenosphere
c.
mesosphere
b.
core
d.
hydrosphere
 

 12. 

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

 13. 

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

 14. 

mc014-1.jpg
Which layer would be the hottest?
a.
A
c.
C
b.
B
 

 15. 

The layer of the Earth where pressure, density, and temperature are the greatest is the
a.
crust
c.
inner core
b.
outer core
d.
mantle
 

 16. 

Which must be true about the Earth’s crust?
a.
it is less dense than Earth’s mantle or core
c.
it is hotter than Earth’s deeper layers
b.
its rocks make up most of Earth’s mass
d.
it has more iron and nickel than the other layers
 

 17. 

The liquid layer that lies beneath the mantle and surrounds the inner core is called the
a.
mesosphere.
c.
lithosphere.
b.
asthenosphere.
d.
outer core.
 



 
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