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Layers of the Earth
Hot Forces!
Sea-FloorSpreading
Pushing Boundaries
Local Celebrities
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Continental Drift
Name the four layers of the Earth from the outside to
the inside
What are the crust, the mantle, the
outer core, and the inner core?
These are the two metals that are
found in the core of the Earth
What are iron and nickel?
This is created by the liquid outer core of the Earth moving
around the solid inner core
What is the Earth’s magnetic
field?
This is the plastic, upper portion of
the mantle
What is the asthenosphere?
These two layers of the Earth combine
to form the lithosphere
What are the crust and the mantle?
This is the transfer of heat through
empty space
What is radiation?
This type of force builds up
mountains and land masses
What are constructive
forces?
________________ in the asthenosphere
cause the movement of lithospheric plates.
What are convection currents?
Rain, wind, ocean waves, sleet, and
hail are examples of these
What are destructive forces?
This is the heat source for
convection in the asthenosphere
What is heat from the core of the
Earth?
This “super-continent” began to
break apart 225 million years ago
He is the father of the theory of Continental
Drift
(5 bonus points if you know his middle name)
Who is Alfred Lothar Wegener?
This mountain range follows the
coastlines of South America and
Africa
What is the mid-Atlantic ridge?
The shapes of these coastlines provide
evidence for Continental Drift
What are (S. America and Africa/Africa and N. America/
N. America and Europe)?
Two (of the four) pieces of evidence that Wegener used to prove his theory
What are folded mountain ranges,
coal beds, glacial deposits, and Glossopteris fossils?
The location of the newest/youngest rocks on the sea
floor
What is close to the mid-ocean ridge?
This ocean is shrinking
What is the Pacific Ocean?
The location where the oceanic
crust plunges under the
continental crust
What is the deep-ocean trench?
This is what it’s called when the
oceanic crust plunges under the continental crust
What is subduction?
These are two (of the three) ways that
scientists proved that sea-floor spreading
occurs
What are observing magnetic stripes, sea-floor drilling samples,
and recognizing newly-formed rocks at the mid-
ocean ridge
This is a break in the Earth’s crust where rocks have slipped past each
other
What is a divergent boundary?
What is a convergent boundary?
What is a transform boundary?
Earthquakes occur at this type of plate
boundary
What is a transform boundary?
This is the name of a volcano in the Portland Area
What is (Mt. Tabor, Mt. Hood,
the West Hills, Mt. Saint Helens,
Mt. Rainier…)
This is the small lithospheric plate
off the coast of Oregon and Washington
What is the Juan de Fuca plate?
The coastal mountain range was created by these types of
forces
What are constructive
forces?
This mountain range was created by the
smashing together of the Juan de Fuca plate
and the North American plate
What is the cascade range?
Mount St. Helens’ most recent
eruption occurred in this year
What is 1980?(May 18th, to be
exact)
Draw a convection current in the asthenosphere.
Label:lithosphere,
mantle,core.