Plate Tectonics - Seafloor Spreading Question Preview (ID: 38389)
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Plates that move away from each other are ______
a) divergent
b) convergent
c) transform
d) subducting
Plates that move toward each other are ______
a) convergent
b) divergent
c) transform
d) sliding
Plates that slide past each other occur at ___________boundaries
a) transform
b) convergent
c) divergent
d) subduction
__________ came up with the theory of Seafloor spreading
a) Harry Hess
b) Henry Hess
c) Alfred Wegener
d) Marie Tharp
Pangaea was the name of _______
a) the super continent that existed 250 million years ago.
b) The super continent that existed 25 million years ago
c) The super continent that existed 400 million years ago
d) The super continent that existed 4 million years ago
Seafloor spreading occurs at a __________boundary
a) divergent
b) convergent
c) transform
d) none of the above
The idea that the earth is divide into plates and are constantly in motion is ____
a) Plate tectonics
b) Continental drift
c) supercontinent
d) evidence
Subduction occurs at _______________.
a) convergent boundaries
b) midocean ridge
c) divergent boundaries
d) transform boundaries
Convection occurs in the _______.
a) mantle
b) crust
c) inner core
d) outer core
The Atlantic ocean basin is __________.
a) getting wider
b) getting smaller
c) staying the same size
d) getting deeper
Alfred Wegener could explain how the continents moved
a) False
b) True
c)
d)
__________causes seafloor spreading
a) convection
b) subduction
c) mid-ocean ridges
d) trenches
What happens when oceanic crust meets oceanic crust at a convergent boundary.
a) Older crust subducts under younger crust
b) younger crust subducts under older crust
c) mountains are formed
d) they spread apart
______was used to locate the mid-ocean ridge
a) sonar
b) submarines
c) divers
d)
Why is it difficult to explore the ocean floor?
a) Too much water pressure
b) It is very dark
c) It is cold
d) All of the above
subduction is found at ________
a) trenches
b) mid-ocean ridges
c) volcanoes
d) All of the above
When continental crust converges ______ are formed
a) mountains
b) subduction
c) trenches
d) rifts
Earthquakes occur often at _______boundaries.
a) transform
b) divergent
c) convergent
d) all of the boundaries
Subduction occurs when ______
a) oceanic crust slides under continental crust
b) continental crust slides under oceanic crust
c) continents collide
d) mountains are formed
The transform boundary found in California is named __________.
a) San Andreas fault
b) Rift valley
c) Mid-ocean ridge
d) California fault
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