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Earthquakes

Ms. Lanigan's 6th Grade Science

TermDefinition
Pwave Primary wave that moves vertically and moves faster than secondary wave.
Swave Second wave that moves horizontally and moves slower than primary waves
Convection Heat transfer through the mantle that causes plates to move
Oceanic Type of crust found on the ocean floor
Thinner Oceanic crust is denser and _____ than continental crust
Continental Type of crust that is found on land
Dense Continental crust is less _____ and thicker than oceanic crust
Inner core Solid, made of iron and nickel
Outer core Made of liquid iron
Mantle Part of the lithosphere and asthenosphere, makes up 83% of Earth’s interior
Lithosphere The upper part of the mantle and the crust of the earth, rigid and cooler than the asthenosphere
Asthenosphere Part of the mantle, solid, but flows like taffy
Earthquake Movement of the Earth’s crust caused by tectonic plate movement
Pangea The supercontinent
Convergent Type of boundary where two plates move toward one another
Mountain Forms when two continental plates converge
Trench Forms when two oceanic plates converge
Divergent A boundary where two plates move away from one another
Ridge Forms when two oceanic plates move away from one another: Mid Atlantic _____.
Transform Type of boundary where two plates slide in opposite directions, side-by-side
Hot spot An area where magma seeps up through a plate (like Hawaii)
Subduction When a dense oceanic plate slides beneath another plate, causing it to go deep into the mantle
Ring of Fire The area around the Pacific plate where there is a lot of volcanic activity because of the faults, where 80% of earthquakes happen.
Sea floor New _____ is made when two oceanic plates diverge
Atlantic A divergent plate boundary in the Atlantic Ocean is called the Mid - _____ Ridge where 5% of earthquakes happen.
Himalayan A convergent boundary – the Mediterranean-_____ Belt, where 15% of earthquakes happen.
Created by: BTLanigan