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Plate Tectonics Flashcards | StudBud
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Plate Tectonics
Plate Tectonics
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Plate tectonics test
Flashcards
33 cards
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Practice quiz
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Questions
33
Answers
1
Earth's inner core consists of
cool rock
soft, tarlike rock
solid metals
liquid metals
2
Which of Earth's layers is the thinnest?
crust
mantle
core
3
The process by which the ocean floor sinks beneath a deep-ocean trench & back into the mantle
subduction
conduction
convection
continental drift
4
Relating cause & effect: What causes the convection currents labeled A? (label A and B)
pressure in the inner core
compaction on the surface
heat inside the mantle and core
5
How much do the lithospheric plates move in one year?
a few centimeters
thousands of centimeters
thousands of kilometers
a few kilometers
6
Which choice names Earth's layers in order from 1 to 4
crust, mantle, outer core, inner core
crust, outer core, inner core, mantle
mantle, inner core, outer core, crust
7
Between what two layers would you draw a line to show the top of the asthenosphere? *add number
2 and 3
3 and 4
1 and 2
8
Inferring: What causes magma to form at this plate boundry
oceanic plate sinks beneath the continental plate & melts
continental plate pushes magma up from the mantle
contnental plate gets warmer and melts
9
Pangaea was Alfred Wegener's name for
the places where plates meet
the process that moves Earth's plates
the lithosphere
l;andmass made up of all the continents
10
Which kind of plate boundary occurs between plates A and B (write letters on image)
convergent boundary
divergent boundary
transform boundary
11
A boundary where two plates push together is called
transform boundary
convergent boundary
divergent boundary
12
What happens in sea-floor spreading?
New rock forms
New rock sinks into the mantle
old rock is pushed toward the middle of the ocean
13
Once magma reaches the surface it is called
lava
rock
silica
14
Earth's plates move because of
convection currents
conduction
seismic waves
15
Explosive volcanic eruptions and strong earthquakes often occur at
divergent boundaries
convergent boundaries
all types of plate boundaries
transform boundaries
16
Applying concepts: in which 2 layers do convection currents occur? (add numbers 1-4)
1 and 2
3 and 4
2 and 3
17
The convection currents labeled cause
Earth to be a giant magne
sea floors to spread
continents to drift
18
Applying Concepts: Which process happens at this kind of boundary? (write letters on image)
subduction
converging
sea-floor spreading
19
Most major earthquakes, volcanoes, and mountain ranges occur
in the middle of tectonic plates
along the edges of continents
where tectonic plates meet
in North & South America
20
Interpreting Diagrams: What kind of plate boundary is shown in the diagram?
convergent boundary
transform boundary
divergent boundary
21
At a mid-ocean ridge, molten rock rises up & cools to form new ocean floor; mid-ocean ridge is
B
D
C
A mid-ocean ridge
22
Which of the following compositional layers makes up the greatest percent of Earth's mass?
oceanic crust
the mantle
continental crust
the core
23
Which of Earth's layers has the highest temperature?
crust
core
mantle
24
Most of the world's folded mountains formed as a result of
continental-continental collision @ convergent boundaries
continental-continental separation @ rift zones
continental-ocenaic collision @ subduction zones
oceanic-oceanic separation @ mid-ocean ridges
25
Which of the following statements best describes the process shown in the diagram above
occurs very slowly on a global scale
occurs very slowly on a local scale
occurs very quickly on a local scale
occurs very quickly on a global scale
26
Scientists think all present-day continents were once joined in a single super-continent called
Gondwana
Panthalassa
Laurasia
Pangaea
27
The mantle is a layer of
hot rock between the crust and the core
soft metal between the inner & outer core
cool rock that covers Earth's surface
liquid metal between the crust and the core
28
In earth's interior, which of the following increases with increasing depth?
pressure
density
temperature
all of the above
29
The process in which continents slowly move is called
continental drift
sea-floor spreading
subduction
30
Matching fossils & rock types on continents that are separated by ocean today supports the idea
the continents were formerly joined & moved apart
islands once linked all the continents
all continents arose in their present positions @ same time
all the continents of the world are basically the same
31
How does fossil evidence support Wegener's hypotheses of continental drift?
plant & animal fossil show evidence of change Earth polarity
Similar fossils found on far apart landmassess suggest
no similarities exist btween fossils on diff. continents
Fossil evidence suggests the continents have always been
32
The thin layer of cool rock that makes up Earth's surface is called the
core
mantle
mass
crust
33
How do mid-ocean ridges support the idea of continental drift & the theory of plate tectonics?
Tectonic plates collide at mid-ocean ridges
New crust forms at mid-ocean ridges
the crust at mid-ocean ridges is old oceanic lithosphere
Oceanic lithosphere is destroyed at mid-ocean ridges
