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ch.5 plate tectonics Flashcards | StudBud
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ch.5 plate tectonics
ch.5 plate tectonics
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Plate tectonics
Flashcards
29 cards
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Questions
29
Answers
1
Besides their location, how else are continental and oceanic crusts different?
continental crust is thicker than oceanic crust
continental crust is thinner than oceanic crust
continental crusts are smaller than oceanic crusts
continental crust makes plates larger than oceanic crust
2
A collision between two pieces of continental crust at a converging boundary produces a
mid-ocean ridge
rift valley
deep-ocean trench
mountain range
3
Process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle
subduction
continental drift
convection
conduction
4
What does the darker shading indicate?
ocean crust doesn't contain as much iron as continent crust
oceanic crust is thicker than continental crust
ocean crust contains as much magnesium as continental crust
oceanic crust is denser than continental crust
5
Any trace of an ancient organism that has been preserved in rock is called a
continent
landform
fossil
landmass
6
What is a convection current?
the transfer of heat from lower temps, to higher temps
The transfer of heat through a solid: Earth's crust
the transfer of heat by the movement of liquid or a gas
the transfer of heat by direct contact
7
What can you conclude from this illustration?
The two plates are sliding past each other to cause a quake
plates are converging so that a mountain range forms on land
two plates are converging so the ground will sink
the two plates are moving apart to cause a mid ocean ridge
8
What does the illustration show?
stationary plate boundary
convergent boundary
divergent boundary
transform boundary
9
Nowhere under Florida do two plates meet. Which one of the following features doesn't exist?
tectonic plate boundary
mantle
crust
tectonic plate
10
plates motion can cause both slow & rapid changes in Earth's surface. Which is a rapid change?
formation of an ocean trench
seafloor spreading
earthquake
mountain range formations
11
The place where two plates come together is known as a
rift valley
transform boundary
convergent boundary
divergent boundary
12
Which term describes the process of the Rocky Mountains forming from the collision of plates?
divergent boundary
ridge path
transform boundary
convergent boundary
13
What does a convection current transfer between two objects?
electricity
heat
volume
mass
14
What process is taking place in the mantle?
hot rock expands, becomes less dense, and rises
hot rock becomes less dense and starts to move to the core
hot rock expands, becomes denser, and rises
hot rock becomes denser and moves towards the outer core
15
Which is a correct definition of that matches the boundary
at a stationary boundary, plates collide or move apart
at a divergent boundary, plates separate
at a convergent boundary, plates slide past each other
at a transform boundary, plates move apart
16
Geological theory that states that pieces of Earth's lithosphere are in constant, slow motion
sea-floor spreading
plate tectonics
deep-ocean trenches
subduction
17
Which letter represents the layer on which the tectonic plates move?
C
D
A
B
18
What technology did scientists use in the mid-1900s to map the mid-ocean ridge?
submarines
sonar
deep-sea diving
satellites
19
What happens at a transform boundary that can cause an earthquake?
two plates collide
two plates move in the same direction
two plates move away from each other
two plates slide or glide past each other
20
What happens when the crustal plates move as shown in the illustration?
a volcanic eruption
a transform boundary forms where subduction occurs
an ocean forms
sea floor spreading occurs as the oceanic plates move
21
name given to the theory that continents were once a large, single mass that broke apart?
continental slope
continental drift
continental rise
continental shelf
22
Accroding to Wegener's hypothesis of continental drift
Earth is slowly cooling and shrinking
the continents do not move
continents were once joined together in a single landmass
Earth's surface is made up of seven major landmasses
23
old oceanic crust is more dense than new oceanic crust because it is
hot
closer to the mid-ocean ridge
cool
moving toward deep ocean trench
24
Most geologists think that the movement of Earth's plates is cause by
convection currents in the mantle
Earth's magnetic field
conduction
earthquakes
25
In sea-floor spreading, molten material rises from the mantle and erupts
in deep-ocean trenches
along the edges of all of the continents
at the north and south poles
along mid-ocean ridges
26
A place where two plates slip past each other, moving in opposite directions, is known as
convergent boundary
rift valley
divergent boudnary
transform boundary
27
Crust at the mid ocean ridge is younger than the crust as it pushes towards the continents
true
false
28
What name did scientists give to the landmass illustrated here
panacaea
panpan
pangaea
pancreas
29
Which of the following statement about mid-ocean ridges is true?
were first discovered using submarines
have a flat plateau at their highest points
Can be longer than the Rockies and Andes mountain ranges
They are always near the water's surface
