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Earth Structure Questions
1. The lithosphere is composed of which of the following:
a. Upper mantle and crust
b. Crust only
c. Upper mantle only
d. All layers of Earth except for the inner core
2. Which of the following is true of oceanic plates compared to continental plates?
a. Oceanic plates tend to be much older
b. Oceanic plates tend to much thicker
c. Oceanic plates are composed of mostly the same type of material
d. Oceanic plates are typically denser
3. Oceanic crust is primarily composed of this type of material:
a. Granitic
b. Basaltic
c. Gold-based
d. All of the above
4. Of the following, which is the thinnest of Earth’s layers?
a. Mantle
b. Crust
c. Inner core
d. Outer core
5. Short answer: What term refers to the weak, soft layer of solidified magma underneath the lithosphere?
6.
Short answer: Name the plate on which Washington, DC is located.
7.
Which of the following choices most accurately describes the lithosphere?
a. It is like a puzzle, composed of rigid pieces in constant motion
b. It is like a puzzle, composed of rigid pieces that do not move
c. It is one continuous, rigid layer
d. It is one continuous, soft liquid-like layer
8.
Identify Earth’s layers labeled A-C in the cross-section above.
A.
B.
C.
D.
9. What are the two types of crustal plates?
10. Distinguish the lithosphere from the asthenosphere.