Show:
Layers
Continental Drift
Plate Tectonics/convection
Boundaries
100
List the layers of the Earth in order from the outside in.
What is crust, mantle (lithosphere, asthenosphere, mesosphere), outer core, inner core.
100
Who is credited with this theory?
Alfred Wegener
100
What 2 layers of the Earth do we need to know the most about to understand plate tectonics?
crust and mantle or lithosphere and asthenosphere
100
What are the 3 main types of boundaries?
Convergent, divergent, transform
200
Which layer of the Earth do we know the most about?
What is the crust. It is the only layer we can directly observe. (Can't go any deeper)
200
What is the name of the land mass that Wegener named when studying continental drift?
Pangaea
200
How is plate tectonics different than continental drift?
Plate tectonics explains the why and how behind the movement of the continents.
200
Most earthquakes occur along which type of boundary?
transform
300
This characteristics of the mantle allows for the movement of the lithospheric plates.
What is mantle convection/convection currents. (I would also take plasticity or the ability of a solid to flow like a liquid)
300
This theory led to what current theory regarding the Earth?
Plate Tectonics (credited to Holmes [thermal convection] and later Hess [seafloor spreading])
300

Plate tectonics not only told us about how the appearance of the Earth has changed, but also how new ________ forms.

crust/landforms

300
What EVENTS do we often see occurring at plate boundaries?
Earthquakes and volcanoes - would also take subduction, crust building
400
What is the state of matter of the inner core and why?
Solid - the pressure is too great (even though it is VERY hot so you would think it would be a liquid)
400
Wegener had LOTS of evidence based on observations he had made, so why wasn't his theory accepted by the scientific community?
He couldn't explain why or how these large continents could move around.
400

What happens to the density of particles when they heat up?

The density increases

400
Name 1 similarity and 1 difference between convergent collision boundaries and convergent subduction boundaries.
Similarities = plates move towards each other Differences = collision = collide and push up rock subduction = one plate goes under the other
500
How do we know about the layers of the earth if we can't directly observe them?
Seismology - evidence provided by studying seismic waves
500
What was Wegener's big barrier for proving his theory? (What did he lack?)
Technology! (As technology advances, so does science!)
500

What is an example of a hot spot?

Hawaiian islands (answers may vary)

500
Explain how the densities of oceanic crust and continental crust influence what happens when the 2 plates converge.
Denser oceanic crust subducts below the less dense continental crust.