Scientists, Plates, and Progress. Oh My!
He was responsible for the theory of continental drift.
Who is Alfred Wegener?
Process by which new ocean floor is created. This causes the continents to "drift."
What is sea-floor spreading?
Two types of Lithospheric Plates (Tectonic Plates)
What are Oceanic and Continental Plates?
This is a boundary that occurs when two plates are moving away from each other.
What is a Divergent Boundary?
Location directly above the area where the earthquake starts.
What is the Epicenter?
This scientist inspired a tremendous surge in scientific progress in plate tectonics from his idea of sea-floor spreading.
Who is Harry Hess?
Andesite
Granite
What type of rocks make up Continental Plates?
When one lithospheric plate sinks underneath another lithospheric plate.
What is subduction?
This is a boundary that occurs when two lithospheric plates move towards each other.
(ex. Mountains or Deep-Ocean Trenches are created)
What is a Convergent Boundary?
Earthquakes form of motion
What is stick-slip motion?
During Harry Hess' mapping of the sea-floor, he discovered this, which built upon Alfred Wegener's work and ultimately led to his idea of sea-floor spreading.
What are mid-ocean ridges?
Basalt
What type of rocks make up Oceanic Plates?
What happens when a continental plate and oceanic plate collide? (Be Specific)
Denser oceanic plate will subduct under the more buoyant continental plate.
What is a Rift Valley?
Where Seismic waves start underground.
What is the Focus?
Matching Plant Fossils
Matching mountain ranges
Matching coal beds
What is the evidence for Wegener's continental drift theory?
Landforms that are created by a mantle plume hot spot
What are island chains?
This type of "valley" occurs in the ocean when two oceanic plates collide.
Deep-Ocean Trench
This boundary occurs where two tectonic plates slide past each other.
What is a Transform Fault Boundary?
Energy spread through Earth's crust during an earthquake.
Seismic Waves
1. Why earthquakes/volcanoes are located where they are.
2. Why continents seem to fit together like a puzzle.
3. How does the sea-floor grow larger?
DAILY DOUBLE!!!
(2x the Points; Not on Test)
This is the name of the plate that North America can be found on.
North American Plate
1. What is responsible for the movement of lithospheric plates (Tectonic Plates)?
2. Where are they located? (Be specific)
Convection Cells
Lower Mantle
This land feature is a good way of detecting transform fault boundaries.
What is offsetting?
What 3 things are needed for stick-slip motion?