Georgia Science Grade 6

Chapter 10: Plate Tectonics

CRCT Practice

1
What is the name of the ancient supercontinent shown?
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A)Pangaea
B)Gondwanaland
C)Laurasia
D)North America
2
Who developed the continental drift hypothesis?
A)Harry Hess
B)J. Tuzo Wilson
C)Alfred Wegener
D)W. Jason Morgan
3
Which term refers to sections of Earth's crust and part of the upper mantle?
A)asthenosphere
B)plate
C)lithosphere
D)core
4
Suppose that the arrows in the diagram represent patterns of convection in Earth's mantle.Which type of plate boundary is most likely to occur along the region labeled "A"?
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A)transform
B)reverse
C)convergent
D)divergent
5
Which statement is true of the region marked "B" on the diagram?
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A)Plates move past each other sideways.
B)Plates move apart and volcanoes form.
C)Plates move toward each other and volcanoes form.
D)Plates are not moving.
6
About how fast do plates move?
A)a few millimeters each year
B)a few centimeters each year
C)a few meters each year
D)a few kilometers each year
7
Where do Earth's plates slide past each other?
A)convergent boundaries
B)divergent boundaries
C)transform boundaries
D)subduction zones
8
What is the average depth of ocean crust that is 70 million years old?
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A)5 km
B)6 km
C)0 km
D)5.5 km
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