Continental Drift
Man who first proposed that the continents are moving
Alfred Wegener
What is the name of the theory that combines the ideas of continental drift and seafloor spreading and is used to explain many of the the things that exist on Earth.
Plate Tectonics
The 3 ways mountains are formed.
Faulting, Folding, Volcano
What do we call the fastest earthquake waves?
Primary or P waves
Molten rock material that is released by a volcano.
Lava
How does the shape of the continents support the idea of continental drift?
They fit together like a big puzzle indicating they once were together.
The plates are thicker, less dense and made primarily of light colored granitic rock.
Continental Plates
Do fault block mountains form at convergent or divergent boundaries?
Convergent
These earthquake waves have transverse particle movement and do not go through liquids.
Secondary or S waves.
Strike-slip, Continental-Continental collision
How does the fossil record support the concept of continental drift?
As we look at older and older fossils from different continents we see them become more and more alike until we reach a point where they are identical.
Divergent plate boundaries form these ocean features.
Midocean ridges
Mountains that are formed by a series of large scale anticlines and synclines.
Folded Mountains
The actual location within the Earth where slippage causes an earthquake.
Focus
Most volcanoes form where we find these features formed by oceanic crust.
Subduction zones
What theory was developed and explained how the continents moved?
Seafloor spreading
The type of plate boundary occurs when plates slide past each other.
Strike slip
This type of force creates reverse faults.
Compression
These are the slowest earthquake waves and do not travel very far.
Surface or L waves
Shield volcanoes are formed from this type of lava.
Basaltic
Describe 2 things found in rift valleys that indicates that hot magma is near the surface.
Black smokers
Trenches occur whenever we have this earth feature.
Subduction zone
This type of force forms normal faults.
Tension
These ocean waves are often triggered by earthquakes on the seafloor.
Tsunamis
This is the only type of volcano formed at hot spots
Shield