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