Continential drift
Who proposed the idea of continental drift?
alfred wegner
What is the lithosphere?
earth’s crust and upper mantle
What type of movement happens when plates are under compressional stress?
rocks pushing apart
A volcano releases what when it ruptures? (hint, it is 3 things)
hot lava, volcanic ash, and gasses
what way do plates move at a transform boundary?
back and forth
what was the name of the super continent?
pangea
What are the 3 plate movements?
convergent, divergent and transform
Where do earthquakes occur?
fault lines
How do you describe viscous lava?
thick and at a lower temperature
What type of stress is it when plates pull along one another?
shearing
What does matching coastlines have to do with continental drift?
it can prove the continents were all connected at some point because they fit together like a puzzle
What type of currents with magma cause the plates to move?
convection
What is the point in earth where faulting begins?
focus or hypocenter
Name the three types of volcanoes.
- cinder cone, shield and composite cones
What is the elastic rebound theory?
rock will bend until they reach their elastic limit, then they will break/crack and form a fault.
what did they find in africa that suggested continental drift was real?
they found glacial sheets on africa suggesting the location was at one point different than it is currently
What are the three types of convergent boundaries?
continental-continental, oceanic-continental, oceanic-oceanic
P and S waves are what types of seismic waves?
body waves
How do you define an extinct volcano?
hasn’t erupted in the last 10,000 years and is not expected to erupt again
What type of volcano frequently forms in groups?
cinder cone
What does finding coal in antarctica imply?
that the location once had to be warm enough for a forest to grow there as coal is made from organic material and the permafrost currently in antarctica wouldn’t support the growth of plants
What develops when an oceanic and continental plate collide?
Subduction Zone (the more dense plate slides under the less dense plate forming a trench)
What does the richter scale measure?
the energy released by an earthquake
What is a conduit?
a pipe that carries gas rich magma to the surface of a volcano
What is the ring of fire?
a place in the ocean where 75% of all volcanoes occur