Download Essay- choose ONE

Study guide
EARTH SCIENCE
 Earth’s solid inner core spins inside the hot, molten metal of which layer?
 The asthenosphere is part of which layer of Earth?
 Pressure increases with depth toward the center of Earth. In which layer would you expect
pressure to be the greatest?
 Which layer of Earth is made up partly of crust and mantle material?
 Overall, which layer of Earth appears to be the thickest?
Continental Drift theory OR Sea-floor Spreading
 Climate clues
___________________
 Magnetic alignment of rocks ___________________
 Rock formation/mts. Clues ___________________
 Glaciers
___________________
 Age of rocks (core samples) ___________________
 Fossil clues
___________________
KEY TERMS
 ___The theory that states all continents were once a part of one giant landmass, split
apart and slowly moved to there present positions.
 ___The theory that Earth’s crust and upper mantle is broken up into sections.
 ___The process that explains how continents move and where new crust is made.
 ___The name of the giant landmass that was formed 250 million years ago.
 ___This theory was based on evidence from fossils and rock formations.
 ___This theory helps to explain the formation and destruction of the Earth’s crust and its
movements and collisions.
 ___The ages of ocean-floor rocks and magnetic stripes on the ocean-floor are
evidence of this process.
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Movements of the crust may be caused by________________ currents within the mantle.
The lithosphere is divided into sections called _____________.
The places where the sections of the lithosphere meet are called ______________.
A ________________ zone is an area where crust is pushed down and melted.
True/False-Write the word true, if the statement is correct, or write the word false if the
statement is incorrect.
 ________ The oldest rocks discovered on the seafloor are 180-200 million years old.
 ________ The youngest rocks on the seafloor are located at mid-ocean ridges.
 ________ The pattern of magnetic alignment on both sides of a ridge is similar.
 ________ The Earth’s crust is comprised of 10 lithospheric plates.
 ________ Evidence of glaciers was used to prove the ocean floor spreads.
 ________ Oceanic plates are less dense than continental plates.
IDENTIFY- plates involved & the proper boundary
EXAMPLE ANSWER= CONVERGENT (OC-OC)
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Forms volcanic mountain ranges (Cascade MTS.)
Forms volcanic island chains or arcs (Japan)
Forms folded mountains (Appalachian MTS.)
The pacific plate and the North American plate (San Andreas Fault-California)
Which type of plate boundary occurs at X
What feature occurs at Y
What is happening at Z?
Which type of plate boundary occurs at Y? a. convergent b. divergent c. transform
What feature occurs at X
Essay- choose ONE
A-Were the continents ever joined? Cite landform, geologic, climate, and fossil evidence to support the
theory of continental drift.
B- Use three forms of evidence to support the theory of sea-floor spreading.
Essay- choose ONE
A-Were the continents ever joined?
Cite landform, geologic, climate,
and fossil evidence to support the
theory of continental drift.
B- Use three forms of evidence to
support the theory of sea-floor spreading.
Essay- Were Africa and South America ever joined? Cite evidence from landforms, climate,
and fossils to support your answer.
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Make a list of ways the two terms below are different and similar. THINK ABOUT EVIDENCES AND
HOW EACH WAS SUPPORTED!!!!!!!!!!!!!!!!!!!!
SEAFLOOR SPREADING
BOTH
CONTINENTAL DRIFT