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Plate Tectonics - 4
Test Description: Earth's Interior, Sea-floor Spreading
Instructions: Answer all questions to get your test result.
1) How do scientist study earth\\\'s interior?
A
deep-ocean trenches
B
magnetic reversals
C
direct and indirect evidence
D
outer space
2) What are the three layers of the Earth?
A
crust, Moho, core
B
lithosphere, asthenosphere, mantle
C
mountains, astroids, Moho
D
crust, mantle, core
3) What are seismic waves?
A
waves formed in the ocean
B
waves formed as a model
C
waves formed by several layers
D
waves formed by earthquakes used to acquire evidence about earth
4) The process by which ocean floor sinks beneath a deep-ocean trench and back into the mantle is called
A
subduction
B
Pangaea
C
convection
D
radiation
5) Where is the lithosphere?
A
continental crust
B
inner core
C
uppermost mantle
D
below the asthenosphere
6) How thick is the crust?
A
5 -70km
B
2500 - 2,867km
C
1000 - 1216km
D
2000 - 2266km
7) What is the device used to record the echoes of the seafloor?
A
radar
B
sonar
C
seismograph
D
radio
8) How does sea-floor spreading help support the idea that continents drift?
A
It provides explanation of how oceanic crust and continents could move
B
It provides explanation of how magnetic reversal occurs
C
It provides explanation of how lithosphere and asthenosphere move
D
It provides explanation of how convection currents form
9) Where is the youngest ocean crust?
A
farthest from the ridge
B
in the middle
C
at the continent
D
at the ridge center
10) What three types of evidence provided support for the theory of sea-floor spreading?
A
volcanic processes on the ocean floor, magnetic stripes in the sea-floor, age of ocean floor
B
convergent boundary, divergent boundary, transform boundary
C
Moho, magnetic stripes, radiation
D
Pangea, indirect evidence, convection currents
*select an answer for all questions
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