Pangea
These remains of living things helped Wegener prove continents were once connected.
What are fossils?
This is where new ocean crust is formed.
What is a mid-ocean ridge?
Hot rock rises and cool rock sinks in these.
What are convection currents?
If melted material reaches Earth’s surface, this forms.
What is a volcano?
This force pulls Earth’s crust apart.
What is tension?
These plant fossils were found on five different continents.
What are fern-like plant fossils?
Molten rock that rises through cracks in Earth’s crust.
What is magma?
These currents help move Earth’s plates.
What are mantle convection currents?
This type of magma is thick and sticky.
What is high-silica magma?
At this type of fault, the hanging wall falls.
What is a normal fault?
The scientist who proposed the theory of continental drift.
Who is Alfred Wegener?
Older ocean rock is found ______ from the mid-ocean ridge.
What is farther away?
What determines how plates interact at their boundaries.
What are the type of boundary and the direction of plate movement?
High-silica magma is most likely to cause this type of eruption.
What is an explosive eruption?
This landform forms when the hanging wall drops.
What is a valley?
This type of evidence showed that continents were once joined together.
What is fossil evidence?
This is the process where ocean crust sinks beneath continental crust.
What is subduction?
Plates pulling apart move at this type of boundary.
What is a divergent boundary?
A slow, steady lava flow forms this type of volcano.
What is a shield volcano?
The magnitude of an earthquake measures this.
What is the energy released?
The idea that continents were once one large landmass.
What is continental drift?
This deep ocean feature forms at subduction zones.
What is an ocean trench?
Plates pushing together move at this type of boundary.
What is a convergent boundary?
This is one cause of shield volcano formation.
What is a hot spot?
The 2011 Japan earthquake had this very high number.
What is a magnitude of 9.0?