Vocab unit 2 dynamic earth Flashcards
The continents that were once joined to together as a supercontinent.
Pangaea
The supercontient Pangaea slowly drifted apart into separate continents over time.
Continental Drift
Vast mountain ranges deep below the oceans surface
Mid-Ocean Ridges
The counterparts of underwater mountain chains.
Ocean Trenches
The process by which new oceanic crust continuously forms along mid-ocean ridges and is destroyed at ocean trenches.
Seafloor Spreading
Molten rock below Earth’s surface.
Magma
When magma erupts onto Earth’s surface.
Lava
Earth’s surface is made out of rigid slabs of rock, or plates, that move with respect to each other.
Plate Tectonics
The boundary between two plates moving towards each other.
Convergent boundary
Where two plates move apart from each other.
Divergent Boundary
Where plates slide horizontally past each other.
Transform Boundaries
When two plates collide with each other, one plate is forced under another.
Subduction
A break in Earth’s crust along which movement occurs.
Fault
A vent in Earth’s crust through which molten rock flows.
Volcano
A curved line of volcanoes that forms parallel to a plate boundary.
Volcanic Arc
The rupture and sudden movement of rocks along a break or a crack in Earth’s crust.
Earthquake
An area of many fractured pieces of crust along a large fault.
Fault Zone
The rapid downhill movement of soil, loose rocks, and boulders.
Landslide
A wave that forms when an ocean disturbance suddenly moves a large volume of water.
Tsunami
Giant circular depressions in Earth’s surface.
Impact Craters
Any natural process that changes objects on Earth’s surface over time.
Weathering
Moving of weathered material, or sediment, from one location to another.
Erosion.
The laying down or settling of eroded material.
Deposition
A large mass of ice that forms on land and moves slowly across Earth’s surface.
Glacier
