Layers of the Earth
Types of Boundaries
Sea-floor Spreading and Continental Drift
Major Plates
Asthenosphere, Lithosphere, Convection Currents, and Lithospheric Plates
100
The 4 layers of the Earth
What is the crust, the mantle, the outer and inner core
100
Name the 4 types of boundaries
What is divergent, convergent-subduction, convergent collision, and transform sliding boundaries
100
Person who proposed that movement of continents was sea-floor spreading
Who is Herman Hess
100
Number of major plates Earth is split into
What is 7
100
Where the crust and upper mantle meet
What is the lithosphere
200
The thickest layer of the Earth
What is the mantle
200
Features are folded mountains
What is convergent collision boundary
200
Sea-floor spreading is caused by
What is convection currents in the asthenosphere
200
The semi-rigid part of the middle mantle
What is the asthenosphere
300
Features are earthquake zones and fault zones
What is transform sliding boundary
300
Person who proposed about continental drift
Who is Alfred Wegener
300
Lithospheric plates ride on the
What is the asthenosphere
300
Caused by very hot material in the deepest part of the mantle
What are convection currents
400
1,400 miles thick, made of liquid, iron, and nickel
What is the outer core
400
Features are volcanic mountains and trenches
What is convergent-subduction
400
Reason that continental drift wasn't accepted
What is Wegener couldn't explain what force was strong enough to move the plates
400
What occurs along plate boundaries (give at least two)
What are earthquakes, volcanic activity, mountain building, and oceanic trench formation
400
Plates that "float" on a soft semi-rigid asthenosphere
What are lithospheric plates
500
Layer has temperatures and pressures so high it squeezes metals together
What is the inner core
500
Features are rift valleys and Mid-Atlantic mountains and volcanoes
What is divergent boundary
500
The two people who discovered an underwater mountain
Who is the physicists Ewing and Heezen
500
Convection currents' repeated cycle
What is rising, cooling, and sinking again
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