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WorksheetsPlate Tectonics Review
Total questions: 20
Worksheet time: 10mins
Continental drift is the idea that
continents move over time
some continents subduct under others
Earth's magnetic pole has reversed
earthquakes occur at plate boundaries
Evidence to support seafloor spreading includes
similar rocks on different continents
evidence of magnetic pole reversal on ocean floor
fossils of animals and plants have been found on different continents
rocks are younger at mid-ocean ridges, and older at the continents
Continental drift occurs because of
Pangaea
earthquakes
seafloor spreading
the Earth's magnetic poles have reversed
Where plates converge, _____________ can occur.
mountains
rift valleys
volcanic arcs
ocean trenches
The Himalayas form at a _________ boundary
oceanic-oceanic convergent
transform
oceanic-continental convergent
divergent
continental-continental convergent
The Andes Mountains form at a _________ boundary
oceanic-oceanic convergent
transform
oceanic-continental convergent
divergent
continental-continental convergent
The Marianas Trench forms at a _________ boundary
oceanic-oceanic convergent
transform
oceanic-continental convergent
divergent
continental-continental convergent
Japan forms at a _________ boundary
oceanic-oceanic convergent
transform
oceanic-continental convergent
divergent
continental-continental convergent
The San Andreas fault forms at a _________ boundary
oceanic-oceanic convergent
transform
oceanic-continental convergent
divergent
continental-continental convergent
The East African Rift Valley forms at a _________ boundary
oceanic-oceanic convergent
transform
oceanic-continental convergent
divergent
continental-continental convergent
The Mid-Atlantic Ridge forms at a _________ boundary
oceanic-oceanic convergent
transform
oceanic-continental convergent
divergent
continental-continental convergent
Seafloor spreading occurs because
earthquakes break apart the ocean floor
new material is added to the asthenosphere
hot, less dense material is forced upward
sediments accumulate on the ocean floor
Earth's ___________ has reversed many times
asthenosphere
gravity
core
magnetic field
Do volcanoes form on the San Andreas fault?
No, because no magma can get to the surface
Yes, because there is a subduction zone
Yes, because there is a rift
No, because there are earthquakes
Who came up with the idea of continental drift?
Harry Hess
Alfred Wegener
Who came up with the idea of seafloor spreading?
Harry Hess
Alfred Wegener
New crust is being added constantly. Why doesn't the Earth expand?
Old crust is destroyed
Some crust is subducted back into the Earth
The crust piles on top of itself
Seafloor spreading moves the continents
What is a cycle of heating, rising, cooling and sinking called?
conduction
convection
subduction
convergence
Folded mountains form at
divergent boundaries
continental-continental convergent boundaries
oceanic-continental convergent boundaries
oceanic-oceanic convergent boundaries
Convection within the Earth might cause plate movement because
it causes the magnetic poles to reverse
convection is subduction
convection is continental drift
constant motion in the Earth can move plates on the surface
