Plate Tectonics 1
Who developed the theory of continental drift?
Alfred Wegner
What layer of earth do tectonic plates sit on? This layer is below the lithosphere
Asthenosphere
If an oceanic and continental crust converge, what will happen and why?
the oceanic crust will slide under the continental crust because it is more dense (making trenches, volcanoes, mountain ranges)
The Himalayas were produced by what type of tectonic boundary?
Convergent Boundary
Long, linear depressions in the seafloor due to subduction -
Trenches
What is the outermost layer of the Earth's surface called?
the crust or the lithosphere
There are 3 pieces of evidences that support Wegener's Theory of continental drift. Name two.
Fossil record, continent shapes, and rock layers
What is the denser, but thinner crust type?
Oceanic crust
What is the cycle of a convection current.
Heating magma that rises and spreads the plates then cools and falls over and over again
What natural disasters occurs because of plate movement? Name two.
volcanoes, earthquakes, or tsunamis
What is the process when oceanic crust sinks below continental crust?
Subduction
Super Continent that scientists believe existed and evidence of continental drift.
Pangea
What plate boundary produces sea-floor spreading?
Divergent
What layer of Earth is the only liquid layer?
Outer Core
What forces moves the plates.
Convection currents
What forms when a continental plate converges with a continental plate?
Mountain building/uplift
What geographical feature is caused by continent - continent divergence?
Continental Rift
Name a real life example of continent-continent divergence.
East African Rift
The lithosphere is made up of what two layers of the Earth?
Crust & upper mantle
This layer of the earth is solid metal due to pressure.
Inner Core
At what ocean floor feature would we see seafloor spreading?
Mid-ocean ridge
How do we know what the inside of the Earth looks like if we've never been there? (Hint: These are produced by earthquakes)
Seismic waves (earthquake waves)
At what type of plate boundary would we find a volcanic island arc?
Convergent boundary