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Plate Tectonics
Plate Tectonics
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Review of Chapter 4 sections 3, 4, and 5
Flashcards
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Questions
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Answers
1
Which of the following best describes the process in the diagram?
Colliding plates form a transform boundary.
Colliding plates form volcanoes.
Spreading plates form a mid-ocean ridge.
Spreading plates form a rift valley.
2
What happens to the oceanic crust during subduction?
It sinks into the mantle.
It forms a mid-ocean ridge.
It spreads apart.
It stays the same.
3
The theory that states that pieces of Earth’s crust are in constant, slow motion is called
plate tectonics
Pangea
sea-floor spreading
relativity
4
Undersea mountain chains beneath Earth's oceans are called
mountains
Himalayas
mid-ocean ridge
volcanoes
5
About 260 million years ago, Earth's continents moved together to form the
Atlantic Ocean.
Himalayas.
mid-ocean ridge.
supercontinent Pangaea.
6
Name plate "C" on the map.
Eurasian Plate
Nazca Plate
Indian Plate
Phillipene Plate
7
Subduction of the ocean floor takes place at
the lower mantle.
rift valleys.
deep-ocean trenches.
mid-ocean ridges.
8
A place where two plates slide past each other is called a
divergent boundary
spreading boundary
colliding boundary
sliding boundary
9
The process that continually adds new material to the ocean floor is called
sea-floor spreading
mid-ocean ridges
continental drift
subduction
10
Which one was NOT used as evidence to support Wegener's hypothesis of continental drift?
sea-floor spreading
landforms
fossils
climate
11
Name plate "B" on the map.
Arabian Plate
Antarctic Plate
African Plate
Australian Plate
12
The direction of sea-floor spreading is from
a trench toward the mid-ocean ridge.
the mid-ocean ridge toward a trench.
the core to the crust.
the mantle to the crust.
13
Where does sea-floor spreading take place?
mid-ocean ridges
trenches
mantle
along the edges of continents
14
Which of the following provided evidence for sea-floor spreading?
magnetic stripes
landforms
fossils
climate
15
Name plate "A" on the map.
Nazca Plate
Juan de Fuca Plate
Eurasian Plate
Cocos Plate
16
The process that causes Earth's plates to move is
conduction.
radiation.
convection.
subduction.
17
Two plates come together at
a spreading boundary.
a sliding boundary.
the boundary between the mantle and the crust.
a colliding boundary.
18
The subduction of oceanic crust beneath continental crust occurs because
oceanic crust is warmer than continental crust.
mountains on continental crust push the oceanic crust down.
continental crust is denser than oceanic crust.
oceanic crust is denser than continental crust.
19
The Pacific Ocean is shrinking due to sea-floor spreading.
True
False
20
When an oceanic plate collides with a continental plate,
the oceanic plate is subducted.
the continental plate is subducted.
a mid-ocean ridge is formed.
a rift valley is formed.
21
When two continental plates collide
a rift valley forms.
a mountain range forms.
subduction occurs.
a trench forms.
22
A place where two plates move away from each other is called a
spreading boundary
colliding boundary
sliding boundary
convergent boundary
