Convergent, divergent, transform, and young plate boundaries.
100
The theory that states that pieces of Earth's crust are in constant, slow motion driven by movement in the mantle is called
Plate tectonics
100
What is an earthquake?
A sudden and violent shaking of the ground as a result of movements within the earth's crust or volcanic action.
100
What is a volcano?
A volcano is a rupture in the crust that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
100
What was Wegener famous for?
Theory of Continental Drift and Pangaea
200
What is a conversion-collision boundary?
When 2 plates collide, folding in the middle creating mountains.
200
Oceanic crust is ____________________ than continental crust
More Dense
200
_________ is the force that pulls rocks apart
Tension
200
What 3 types of volcano forms are there?
1. Shield
2. Cinder Cone
3. Strata or Composite
200
What name did Wegener give to his proposed single supercontinent?
Pangaea
300
The place where two plates move apart is called a
Divergent Boundary
300
Continental crust is ______________________ than oceanic crust
Less Dense
300
The magnitude of an earthquake is measured by the
Richter Scale
300
What is the difference between a dormant volcano and an active volcano?
A dormant volcano is not currently active, but may become active in the future. An active volcano is erupting or has erupted recently and is expected to erupt again in the near future.
300
What type(s) of evidence did Wegener use to support his theory?
Puzzle Fit, Fossil evidence from animals that were once on the same continent, and geologic evidence like mountain chains that were connected and now split apart.
400
How do scientists identify plate boundaries?
By studying data from earthquakes
400
What causes the tectonic plates to move?
Convection Currents
400
What is the area where most earthquakes have happened called?
Ring of Fire
400
Where are volcanoes mostly found?
On the edge of continents where tectonic plates meet.
400
Why was Wegener's theory rejected?
He couldn't explain one simple question...What force could possibly be strong enough to move such large masses of land?