Vocabulary
The thinnest layer of the Earth
What is the crust
This Earth Layer exists as a slow moving mass of rocks. Convection currents of molten rock form here.
What is the Mantle?
True or false: The continents are slowly moving.
TRUE!
Earthquakes and Volcanoes are usually located in relation to these
What is a plate boundary
The Himalayan mountains are the result of a ___________________________ boundary.
What is convergent boundary
A number of rigid, but moving, pieces of Earth's surface
What is tectonic plates.
The Earth's inner core remains a solid despite the high temperatures because of this force.
What is the force of pressure?
This is a piece of evidence that suggests the continents were once connected.
What is: Fossil evidence, similar landforms, similar continent shapes?
This land-form is often created when two plates converge and collide.
What is a Mountain?
Hot air or liquid is less ________________ than cool air or liquide
What is dense
The theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift Theory
This is the rigid upper layer of the earth which includes the earth's crust and upper most mantle.
What is the lithosphere?
What is South America?
This is the type of boundary that forms as tectonic plates move away from each other.
What is a divergent boundary?
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes?
States that youngest rocks of ocean floor are at divergent boundaries, moving outward
What is seafloor spreading
This is the average distance the earth's plates move per year.
What is the length that fingernails grow, or a few centimeters per year?
_________ is the name of the continent that existed 250 million years ago.
What is Pangea?
This is the mechanism (what causes) the plates to move
What is convection cycles in the mantle
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary
Although the hottest layer of the Earth, this layer is solid metal.
What is the inner core?
What happens to density of material as you get closer to the center of the Earth?
What is the density of each layer?
This German scientist proposed the Continental Drift Theory.
Who is Alfred Wegener?
This land-form is created as two plates of oceanic crust pull away from each other.
What is a mid-ocean ridge?
This is the name of the single ocean that existed during the time of Pangea.
What is Panthalassa?