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UNIT 9 PLATE TECTONICS Flashcards | StudBud
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UNIT 9 PLATE TECTONICS
UNIT 9 PLATE TECTONICS
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Plate tectonics 8th grade review
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
In what units is the movement of tectonic plates measured?
meters / day
kilometers / month
meters / week
centimeters / year
2
Deep ocean trenches (where Spongebob missed the bus...repeatedly) are formed where?
mid-ocean ridges
subduction zones
rift valleys
faults
3
Which of the following is a major difference between Earth's inner core and outer core?
inner core is gas and outer core is solid
inner core is solid and outer core is gas
inner core is liquid and outer core is solid
inner core is solid and outer core is liquid
4
The middle layer of the Earth is called the _________.
mesosphere
inner core
asthenosphere
lithosphere
5
Which layer of Earth is the most dense?
crust
mantle
core
6
The area where one tectonic plate sinks below another tectonic plate is called a/n __________.
rift valley
mid-ocean ridge
fault
subduction zone
7
Which layer of the Earth is broken apart into pieces called 'tectonic plates'?
asthenosphere
mesosphere
outer core
lithosphere
8
Which statement below shows the correct definition of a tectonic plate boundary?
At a divergent boundary, one plate sinks under another plate
At a divergent boundary, plates separate
At a convergent boundary, plates slide past each other
At a transform boundary, plates move apart
9
Which is NOT a place where the Earth's crust is 'destroyed'?
subduction zone
mid-ocean ridge
deep-ocean trench
convergent boundary
10
The outer layer of the Earth is called the _______.
lithosphere
asthenosphere
mesosphere
inner core
11
Mountains are built at what type of boundary?
divergent
convergent
transform
12
What happens when the tectonic plates move as shown in the diagram?
volcanic mountain ranges form
transform boundary forms
sea floor spreading occurs
an ocean forms
13
Convection currents take place in what layer of the Earth?
mesosphere
asthenosphere
lithosphere
outer core
14
A boundary at which two plates move past each other horizontally, causing earthquakes?
transform
convergent
divergent
15
Which are the only two layers of Earth that are NOT SOLID?
lithosphere and asthenosphere
mesosphere and outer core
mesosphere and inner core
asthenosphere and outer core
16
The layer of the Earth that is 'putty - like' is called the _________.
lithosphere
outer core
asthenosphere
mesosphere
17
According to the theory of plate tectonics, what makes Earth's tectonic plates move?
radiation from Earth's core
volcanic eruptions
convection currents in the mantle
gravitational pull of the moon
18
The 'Ring of Fire' surrounds what tectonic plate?
South American
Nazca
North American
Pacific
19
What type of boundary is being shown in the diagram?
transform
convergent
divergent
20
Which of these best describes the composition of Earth's inner core?
iron and nickel
quartz and oxygen
carbon dioxide and ice
silicon and aluminum
21
Which of the following is a process that occurs at divergent boundaries under the ocean?
formation of mid-ocean ridges
magnetic reversals
formation of continental crust
recycling of crustal material
22
New crust is formed where?
mountain ranges
faults
deep-ocean trenches
mid-ocean ridges
23
What type of boundary is being shown in the diagram?
convergent
transform
divergent
24
Which layer of Earth is the least dense?
mantle
core
crust
25
What type of boundary is being shown in the diagram?
transform
convergent
divergent
