Plate Tectonics - Seafloor Spreading Question Preview (ID: 38389)


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Subduction occurs when ______
a) oceanic crust slides under continental crust
b) continental crust slides under oceanic crust
c) continents collide
d) mountains are formed

Earthquakes occur often at _______boundaries.
a) transform
b) divergent
c) convergent
d) all of the boundaries

When continental crust converges ______ are formed
a) mountains
b) subduction
c) trenches
d) rifts

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

______was used to locate the mid-ocean ridge
a) sonar
b) submarines
c) divers
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

Alfred Wegener could explain how the continents moved
a) False
b) True
c)
d)

The Atlantic ocean basin is __________.
a) getting wider
b) getting smaller
c) staying the same size
d) getting deeper

Convection occurs in the _______.
a) mantle
b) crust
c) inner core
d) outer core

Subduction occurs at _______________.
a) convergent boundaries
b) midocean ridge
c) divergent boundaries
d) transform boundaries

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

Seafloor spreading occurs at a __________boundary
a) divergent
b) convergent
c) transform
d) none of the above

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

__________ came up with the theory of Seafloor spreading
a) Harry Hess
b) Henry Hess
c) Alfred Wegener
d) Marie Tharp

The transform boundary found in California is named __________.
a) San Andreas fault
b) Rift valley
c) Mid-ocean ridge
d) California fault

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

Plates that move away from each other are ______
a) divergent
b) convergent
c) transform
d) subducting

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