Plate Tectonic Movement
The point where two or more plates meet.
Plate boundaries
Define subduction.
When two plates move toward each other, one can go under the other plate, melt, and then erupt as a volcano.
What is an elevated portion of the Earth's crust?
Mountain
Refers to plates that have continental rock on the top edges of the plates.
Continental plate
An intense shaking of Earth's surface.
Earthquake
This type of boundary happens when two plates move alongside each other.
Transform boundary
Why do ocean floor plates subduct beneath continental plates?
Because they are thinner and denser.
Describe how mountains are fomed.
When two continental plates move toward each other, neither one moves below the other. The plates slowly collide and crumple to create a mountain.
Refers to plates that have oceanic rock on the top edges of the plates.
Oceanic plates
An opening in a planet or moon's crust through which molten rock, hot gases, and other materials erupt.
Volcano
This type of boundary happens when two plates move away from each other.
Divergent boundary
What do you call the place where two plates meet a deep canyon?
Interesting fact: Which is more eroded the Himalayan or Appalachian Mountains?
Appalachian Mountains
This plate material is relatively thin.
Oceanic plate
A string of volcanoes and earthquakes, around the edges of the Pacific Ocean.
The Ring of Fire
This type of boundary happens when two plates come together.
Convergent boundary
What happens when melted rock rises to the surface?
A volcano
Are mountains still forming today?
Yes. Mountains are still forming today.
This plate material is relatively thick.
Continetal plate
A chain of underwater mountains formed by seafloor spreading at divergent plate boundaries.
Mid-ocean ridges
Share three ways plate tectonics move.
Plates can move alongside each other. Plates can move toward each other. Plates can also move away from each other.
In a volcano which is less dense the melted rock or the surrounding rock?
Melted rock
Name of mountain with faces of presidents encarved.
Mount Rushmore
Why Ocean Floor Plates Subduct Beneath Continental Plates?
Ocean floor plates subduct beneath continental plates because oceanic plates are denser and thinner than continental plates, causing them to sink beneath the less dense continental plates in a process driven by gravitational forces and plate tectonics.
A process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
Seafloor spreading