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22 questions
In some areas of the world, like California and Japan, earthquakes are a common occurrence. How can this best be explained?
The strong ocean currents are undermining both areas causing earthquakes.
Both areas are located near the edge of the Pacific Ocean, the unstable sand causes earthquakes.
Both areas are subjected to strong ocean wind and waves that causes earthquakes.
Both areas are on the boundary of active plates, the motion of the plates causes earthquakes.
Observe this diagram of a plate boundary. One statement BEST describes what is happening. It is that
the oceanic crust is melting.
the denser ceanic crust is subducting under the less dense oceanic crust
volcanic islands are forming.
the tectonic plates are moving away from each other.
Most geologists think that the movement of Earth’s plates is caused by _______
convection.
continental drift.
subduction.
conduction.
In sea-floor spreading, molten material rises from the mantle and erupts
along the edges of all the continents.
along mid-ocean ridges.
in deep-ocean trenches.
at the north and south poles.
The theory that the continents have not always been in their present locations but have moved there over millions of years
Continental Drift Theory
Plate Tectonics
Alfred Wegener
Lystrasaurus
The place where two plates meet.
plate boundary
tectonic plate
asthenosphere
crust
An area where magma from deep within the mantle melts through the crust above it
mountain chain
rift
subduction zone
hot spot
The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
stressing
seafloor spreading
subduction
shearing
a valley formed by the separation of tectonic plates
deep ocean trench
rift valley
oceanic ridge
Galileo Galilei
Sir issac
Newton
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