Show:
Earthquakes
Plate Tectonics
Continental Drift
Alfred Wegener
Types of Plate Boundaries
100
shaking of Earth's crust caused by release of energy.
What is an earthquake?
100
describes the formation, movements and interactions of plates.
What are plate tectonics?
100
a hypothesis that Earth's continents move on Earth's surface.
What is continental drift?
100
What did Alfred Wegener study?
What is physics, meteorology and astronomy?
100
what occurs along all plate boundaries?
What are earthquakes?
200
break in Earth's crust, movement has occurred.
What is a fault
200
granite, less dense.
What is a continental plate?
200
Did early scientists believe that the continents moved?
What is no?
200
landmass of all the continents welded together.
What is Pangaea?
200
What are the three type of boundaries?
What is convergent, divergent and transform boundaries?
300
point surface directly above a focus.
What is a epicenter?
300
heat from the inner and outer cores transfers to the mantle to create currents.
What is the convection cycle?
300
What did early scientists in the 1900s believe about the continents?
What is land bridges?
300
Where did Wegener die?
What is Greenland?
300
moves past each other
What is a transform boundary?
400
which type of waves "arrive" first?
What is a body wave?
400
create uplifted, folded mountains.
What are continent to continent boundaries?
400
Why could continental drift be proven?
What is the lack of technology?
400
Wegener lived from 1880 to what?
What is 1930?
400
What type of boundary creates rift valleys?
What is a divergent boundary?
500
which has a lower frequency; body waves or surface waves?
What is a surface wave?
500
created Mariana's Trench.
What are ocean to ocean boundaries?
500
what do we currently know about continental drift?
What is the continents move 2.5 cm per year and sea-floor spreading is the cause of continental drift?
500
When did Wegener propose the theory of continental drift?
What is 1912?
500
When one plate with a higher density, slides under one with a lower density.
What is a subduction?