Continental Drift
Scientist who proposed the theory that the Earth's continents had moved over time and were not in their original locations
Alfred Wegener
Type of plate boundary in which two plates come together and collide.
Convergent
Mountains are formed by two ____________ plates ____________ each other.
two continental plates colliding into each other
The inner core
Why didn't people believe Wegener?
He could not explain a force that was big enough to move the land.
Force that is moving the plates around
Convection currents
Zone that is formed when the oceanic crust slips below continental crust. Volcanoes can be found along the continental crust away from the ocean.
Subduction zone
Faults are found at which type of boundary?
Transform boundaries
Where Earth's energy is created
The inner core
Area around the Pacific Ocean where a lot of volcanoes and earthquakes occur?
The Ring of Fire
Name of the supercontinent that was formed million of years ago
Pangea
Mid ocean ridges and rift valleys occur at this type of boundary.
Divergent Boundaries
New ocean floor is created where?
Mid-ocean ridges
Top layer of Earth's crust?
Lithosphere
The older crust can be found where in the ocean?
Technology that was used to map the ocean floor that ultimately was used to prove the theory of continental drift.
SONAR
At transform boundaries 2 plates slip past each other AND earthquakes occur there.
Why are there a lot of earthquakes in California?
It is near/ on a transform plate boundary.
Molten rock that moves the tectonic plates is found at this layer of the Earth?
Mantle
Plate movement that created the Himalayan Mountains (be specific on type of plates)
Two continental crusts colliding into each other.
3 types of evidence that Wegener used to explain continental drift
- Rock compositions of mountain ranges were similar oceans away
- similar fossils were found oceans away
- Continents seems to fit together like puzzle pieces.
Name two plates that share a divergent boundary between them?
~ Eurasian and North American Plate
~ African and Arabian
~ South American and African
~ Australian and Antarctic
~ Pacific and Antarctic
What two features are created from a subduction zone?
Volcanic ranges and under water trenches
Type of crust that is most dense.
Oceanic Crust
Where is crust being destroyed on Earth?
Subduction zones