Earth's Interior
Convecting Mantle
Continental Drift Theory
Evidence of Continental Drift
Plate Tectonics
100
Which section of Earth is composed of liquid metal?
The outer core
100
What is the source of heat that melts the rock material of the asthenosphere and ultimately drives the convection currents that set the lithospheric plates in motion?
the inner core.
100
Name the scientist who developed the Theory of Continental Drift. What was his theory missing that lead to its rejection?
Alfred Wegener. The theory didn't explain what CAUSED the continents to move.
100
Which underwater landform is made where magma emerges between two diverging oceanic plates?
Mid-ocean ridge.
100
Which landform is made where two continental plates collide?
A mountain range
200
List Earth’s layers in order from the center to the surface?
Inner core, outer core, asthenosphere, lithosphere, crust
200
__________ crust is more dense than _________ crust.
Oceanic; continental.
200
Explain how fossils were used as evidence of Wegener's Continental Drift theory.
Fossils of the same organism found on far away continents could mean that the landmasses may have once been connected.
200
What causes the tectonic plates of Earth to move?
Convection currents from the mantle
200
Which landform is made when plates of different densities converge and one plate slips under the other?
A deep-ocean trench
300
Earth's asthenosphere is made of ________
melted rock
300
Less dense fluids _______ and more dense fluids _______.
rise/float; sink/fall
300
Explain how the coastlines of the continents helped Wegener develop his theory of Continental Drift.
Continents fit together like puzzle pieces.
300
Explain why the Pacific Ocean is getting smaller and the Atlantic Ocean is spreading apart. Include the processes and boundary types in your answer.
Pacific Ocean crust is subducting at converging boundaries. New Atlantic Ocean crust is forming at diverging boundaries.
300
Which type of tectonic plate boundaries are most likely to form a volcano? (2 possible answers)
converging oceanic vs. continental plates converging oceanic vs. oceanic plates
400
Geologists obtain indirect evidence about Earth’s interior by
Studying seismic wave activity.
400
In which of Earth's layers do convection currents occur? Be specific.
The asthenosphere.
400
Explain how Wegener used climate as evidence to form his theory of Continental Drift.
Tropical plant fossils were found in arctic areas; the landmasses must have been located near the equator before drifting to arctic regions.
400
Which discovery confirmed that the continents move on plates?
The discovery of sea-floor spreading
400
Draw a continental plate converging with another continental plate. Show the landform created at this boundary.
Show your drawing to Mrs. Ph
500
Due to extreme pressure, the inner core of Earth is
solid
500
What is the melted material that convects in the mantle?
Rock
500
Explain how landforms were used to form Wegener's theory of Continental Drift.
Landforms like mountain ranges and coal fields on separate continents seem once to have been part of the same mountain range or coal field.
500
Name one of the observations Wegener used in support of his Theory of Continental Drift. (4 acceptable answers)
500
Continental plates that pull apart from one another most likely form
Rift valleys
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