Vocabulary
The thinnest layer of the Earth
The crust
There are ______________ main layers of the Earth.
Four
This person created the Continental Drift Theory
Alfred Wegener
Earthquakes and Volcanoes are usually located in relation to these
Plate boundary
This is one surface feature that occurs at a transform boundary
Earthquake OR Fault line
A number of rigid, but moving, pieces of Earth's surface
Tectonic plates
The thickest layer of the Earth
Mantle
This evidence supports the theory of continental drift because the exact same layers of rock can be found along the coast of different continents
Rock sequences
The mid-ocean ridge is an example of a ____________________ boundary and ___________________ occurs here where new ocean floor is formed.
Divergent boundary; Sea-floor spreading
This is one surface feature that occurs at a convergent boundary of two continental plates
Mountains
The theory that all continents are fragments of Pangaea now drifting apart
Continental Drift Theory
Plates float on top of the _______________________.
Asthenosphere
Evidence of tropical plants and coal deposits were found on this continent which support the theory of continental drift
Antarctica
This type of plate boundary creates the majority of the volcanoes around the Ring of Fire
Convergent boundary
This is one surface feature that occurs at a convergent boundary of an oceanic plate and a continental plate
Trench OR Volcano
The process by which the ocean floor moves apart at a divergent boundary creating new oceanic crust
Seafloor spreading
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
Lithosphere
This is the name of the supercontinent that once existed 250 million years ago.
Pangea
This is the mechanism that causes tectonic plates to move
Convection currents in the mantle
This is one surface feature that occurs at a divergent boundary
Mid-ocean ridge (2 oceanic plates) OR Rift valley (2 continental plates)
Although the hottest layer of the Earth (hotter than the surface of the Sun), this layer is solid metal
Inner core
There are two kinds of Earth's crust: thick, _____________________ crust and thin, _____________________ crust.
Continental; Oceanic
Continental Drift Theory was not accepted because it did not explain this
How the continents were able to move
This is the process in which one tectonic plate dives beneath another tectonic plate.
Subduction
This is the type of plate boundary at which you can usually find a hot spot
NONE (hot spots do not occur at plate boundaries)