Week 4: Plate Tectonics Answers

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1
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Study the image of Earth’s interior.

Question illustration
A
how convection currents move in Earth’s interior
B
the location of heated material near Earth’s surface
C
where plates move as material cools in the outer core
D
why the densities of materials remain constant at different layers
2
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Study this image.

Question illustration
A
mountains
B
rift valleys
C
volcanoes
D
island chains
3

During the process of mountain building, earthquakes sometimes occur along continental-continental convergent boundaries. Which statement best describes the motion of the plates along these boundaries that causes the earthquakes?

A
The plates push apart from each other with no subduction.
B
Subduction occurs with the less-dense plate sinking below the other plate.
C
Subduction occurs with the more-dense plate sinking below the other plate.
D
The plates smash together with no subduction.
4

Study the image of a plate boundary.

Question illustration
A
mountain
B
rift valley
C
earthquake
D
island chain
5

Study the image about convection currents.

Question illustration
A
1
B
2
C
3
D
4
6

Into which layer of the Earth do plate boundaries extend?

A
outer core
B
lithosphere
C
lower mantle
D
asthenosphere
7

Study the map.Which plate borders the Philippine Plate?

Question illustration
A
African
B
Antarctic
C
Eurasian
D
North American
8

Which statement explains the relationship between the density of a material and its movement in Earth’s interior?

A
Cooler materials move from Earth’s mantle to the lithosphere.
B
Cooler materials are highly dense, causing them to sink to the outer core.
C
Warmer materials sink to the mantle because their density slowly decreases.
D
Warmer materials have a high density, causing them to rise to Earth’s surface.
9

Which statement describes the process of subduction?

A
Convection currents cause two plates to move away from each other.
B
A plate slides beneath another plate due to convection currents and gravity.
C
Materials are heated and transferred within Earth’s interior by density.
D
Heat cycles in the mantle cause plates to constantly move.
10

Study this image.

Question illustration
A
A volcano is forming.
B
Plates are converging.
C
A rift valley is forming.
D
A transform boundary is occurring.

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