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Interior Of The Earth and Plate Tectonics Flashcards | StudBud
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Interior Of The Earth and Plate Tectonics
Interior Of The Earth and Plate Tectonics
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A quiz of vocabulary for the Dynamic Earth Unit
Flashcards
44 cards
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1
What is Seafloor Spreading?
the gradual erosion of water forming canyons
occurs @ ridges where new crust forms & graduallymoves away
when the oceans get larger
plates coming together to form trenches
2
What will likely happen to the height of the Himalayas?
The will continue to grow in height.
The will remain the same height
No one knows
The will grow higher the stop in 10 years
3
What type of plate boundary describes the motions of the Pacific and North American Plates in the Pacific Northwest?
transverse
none of these
divergent
convergent
4
What kind of plate boundary runs through Iceland?
Convergent type 1
Divergent
transform
convergent type 2
5
Which type of evidence was
NOT
used by Alfred Wegener to support his continental drift theory?
Evidence from fossils
Evidence from human remains
Evidence of ancient climatic conditions
Evidence from rocks and landforms
6
What part of earth is plastic-like and malleable?
The crust
the mantle
the asthenosphere
the lithospere
7
What is happening at mid-ocean ridges?
plates are colliding
plates are spreading apart
plates are subducting
plates are sliding past each other
8
Seafloor Spreading
the extremely hot, dense center of the Earth; composed mainly of nickel-iro
scratches on bedrocks that were caused by glaciers that were moving downslo
the magma that rises from the mantle intrudes and fills the gap between two
two extinct groups of ancient mammal-like reptiles, their fossils have been
9
Evidence for continental drift includes how similar the coast line is of these two continents:
Africa and N. America
S. America and Africa
N. America and S. America
Australia and Antarctica
10
What feature is usually found over subduction zones?
Earthquakes
Volcanoes
Mountain Ranges
All of these
11
Seafloor spreading ___________ crust.
eats
destroys
creates
envelops
12
A subduction zone creates a __________ and __________.
earthquake; tsunamis
trench; volcanoes
continent; oceans
mid-ocean ridge; mountains
13
Which of these concepts is true about plate tectonics?
continents float on the asthenophere and move randomly
continents are in slow and constant motion
all of these
continents are fixed
14
The scientist who came up with the Theory of Continental Drift was .......
Alfred Hitchcock
Alfred Wegener
Alfred Nobel
Alfred Marshall
15
What blocks molten material in the mantle from rising up higher?
the crust
the core
the atmosphere
The lithospere
16
This is strong evidence supporting the continental drift
oceans
fossils
pyramids
sediments
17
Why does subduction cause volcanoes?
Because increasing pressure
Because it scrapes open volcano magma chambers
Because the subducting plate melts in the bringing water vapor and CO2
Because it creates holes for magma to flow through
18
What does seafloor spreading create?
Nothing
New continental crust
Valleys
New oceanic crust
19
What leads to the formation of island arcs?
the collison of a continental and oceanic plate
diverging oceanic plates
collision of continental plates
colliding ocanic plates
20
What plates are colliding to form the Himalaya mountains?
The Indian Plate and Eurasian
The Pacific Plate and Eurasian Plate
The Indian and the Arabian
The Indian-australian Plate and the Pacific Plate
21
What is known as a crack in earth's crust?
a valley
a rift valley
a fault
an earthquake
22
What force causes denser material to fall?
heat
gravity
cooling
convection
23
Which layer of earth causes convection currents?
mantle
the crust
inner core
outer core
24
What portion of earth is broken into plates?
the asthenospere
the crust
the litoshphere
rock
25
What is the result of seafloor spreading?
mountains
volcanoes
ridges
trenches
26
Seafloor spreading occurs when two plates
slip passed each other creating earthquakes
are moving away from each other creating ridges
When one plate subducts beneath another less dense one
are colliding into each other
27
What type of boundary describes the motions of the Pacific and North American plates near California?
Transform
Convergent Type 1
Convergent Type 3
Divergent
28
A subduction zone is where two plate do what?
Separate and form new continents.
Spread apart to form new crust.
Collide and one is pushed under and destroyed.
Collide and form mountains.
29
What effect does convection have on earth plates?
it causes volcanoes and earthquakes
all of these
it makes the earth's plates move
it causes sea floor spreading
30
What is the border between two tectonic plates?
a rift
a trench
a division
a boundary
31
What is true about oceanic crust?
it is least dense and may subduct
it is more dense and may subduct
it is old
It is less dense than continental
32
Seafloor spreading works like a...
Roller Coaster
Volcano
Conveyor Belt
Slinky
33
What may form and mid-ocean ridges?
rifts
volcanoes
mountains and volcanoes
mountains
34
What is true about oceanic crust?
It is less dense than continental
it is more dense and may subduct
it is least dense and may subduct
it is old
35
What is LEAST likely to happen when two continental plates diverge?
earthquakes
volcanoes
mountains
rift valleys
36
What causes volcanoes near subduction zones to erupt more violently?
Magma chambers are usually larger.
Trenches are formed.
More rock is melted into the magma.
More gases are added to the magma.
37
What discovery gave meaning to Wegener's theory?
continental drift
sonar
seafloor spreading
magnetic reversal
38
During convection, when do particles sink?
When they are hot
When they are closest to the heat source and moving
When they are farthest away from the heat source and cooling
When they are far apart
39
What part of a mid-ocean ridge is the youngest?
The rock 300 km from the center
the rock closest to the center
the volcano
the rock farthest from the center
40
Why wasn't Alfred Wegener's Continental Drift Theory accepted by the science community?
He could not explain how the plates moved
People felt that there wasn't enough evidence
people are closed minded
The evidence did not make any sense
41
What evidence did Wegener have for continental drift?
nothing very convincing
mountain chain and fossil evidence
plate tectonic theory
seafloor spreading
42
Rocks on the seafloor that lie in a pattern show that _____ has changed?
earth's temperature
the geosphere
our magnetic field
earth's density
43
Which of the following is NOT a likely result of subduction?
earthquakes
mountain building
rift valleys
the formation of volcanoes
44
Where do convection currents occur in earth?
the mantle and the outer core
only in the mantle
The crust and the mantle
the outer core and the inner core
