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Plate Boundaries
Earth's Layers
Pangaea
The Earth Moves
Everything
100
A boundary in which two plates collide causing immense mountain building or a subduction zone.
What is a convergent boundary?
100
It is composed of nickel and iron under such great temperatures and pressures that the metals are in a solid state of motion.
What is the Inner Core?
100
The thin, fragile, and rigid lithosphere is broken up into 12 main ones. These move very slowly at about 1 inch to 4 inches per year.
What are plates?
100
When the plates move they collide or spread apart allowing the this to escape.
What is lava or magma?
100
Super continent 250 million years ago. The seven continents were all connected together into one huge land mass.
What is Pangaea?
200
formed at a convergent plate boundary where one plate is lighter and thicker than the other causing the thinner denser plate to be driven down into the mantle.
What is a subduction zone?
200
molten rock under the Earth's surface. It is full of gas and under extreme pressures. It will collect in areas of weak rock far under the surface of the Earth in zones called _____ chambers
What is magma?
200
When we say the Earth's plates are dynamic, we mean they are
What is constantly changing?
200
This layer is so hot that the metals in it are all in the liquid state.
What is the Outer Core?
200
Largest layer of the Earth located directly under the crust. It is composed of very hot, dense, flowing rock. The material in the it flows because of convection currents.
What is the mantle?
300
A boundary in which two plates are separating or moving in opposite directions.
What is a divergent boundary?
300
The outer layer of the Earth. It consists of ocean plates and continental plates. It is composed of light material called rock.
What is the crust?
300
These are circular currents caused by the difference in temperatures from the bottom to the top of the mantle. It is because of these that the Earth's plates move.
What are convection currents?
300
These form at subduction zones. They are the deepest part of the oceans and the lowest points on the crust of the Earth.
What are trenches?
300
Like tears in the Earth's crust, the San Andreas Fault in California is this kind of boundary.
What is a transform boundary?
400
A boundary in which two plates scrape and slide past each other.
What is a transform boundary?
400
Under the mantle, it is composed of liquid nickel and iron.
What is the Outer Core?
400
This states that the continents have moved and are still moving today.
What is the Continental Drift Theory?
400
Because this Pacific Ocean region has more earthquakes and volcanic activity than any other area of the world, the region has been given this nickname.
What is the Ring of Fire?
400
This was formed because of a three-way split in the crust allowing massive lava flows. The split was caused by an upwelling of magma that broke the crust in three directions and poured out lava over hundreds of square miles of Africa and South America.
What is the Triple Junction?
500
Formed at a divergent plate boundary, the world's longest continuous mountain range is over 40,000 miles long. Where the two plates separate lava fills the void causing new crust to be produced. They are ocean spreading zones.
What is a mid-ocean ridge?
500
Made of dense basaltic rock, these plates carry the continental plates across the surface of the Earth.
What are oceanic plates?
500
He introduced the Continental Drift Theory in 1912 even though he didn't understand exactly what caused the plates to move.
Who is Alfred Wegener?
500
This is the area where the crust and the upper rigid layer of the mantle seem to move together and form the plates of the Earth.
What is the lithosphere?