Earth Science Geology, the Environment, and the Universe

Section 1: Crust-Mantle Relationships

Self-Check Quizzes-English

1
Continental crust is made mostly of __________ and oceanic crust is made mostly of __________.
A)granite, basalt
B)basalt, granite
C)granite, rhyolite
D)gabbro, basalt
2
What are two main elevation modes on Earth?
A)0 km to 1 km above sea level and 4 km to 5 km below sea level
B)1 km to 4 km above sea level
C)4 km to 5 km above sea level and 0 km to 1 km below sea level
D)4 km to 5 km above sea level
3
What is isostatic rebound?
A)the process of mountains eroding to flat ground
B)when oceanic crust rises above continental crust
C)how the mantle keeps mountains upright
D)when the crust rises as it loses overlying material and mass
4
Why does continental crust rise higher above the surface of Earth than oceanic crust?
A)Continental crust is less dense than the mantle.
B)Continental crust is thinner and less dense.
C)Oceanic crust is under continental crust.
D)Continental crust is thicker and is less dense.
5
What provides the buoyant support that allows mountain ranges to "float" above the mantle?
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A)the crust
B)molten rock material
C)roots
D)gravity
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