Layers and Tectonic Plates Quiz Flashcards
As you go deeper into the earth what happens to the temperature?
Hotter
Lithosphere
A rigid layer made up of the uppermost part and mantle of the crust.
Divergent Boundary
The boundary between 2 tectonic plates that are moving away from each other.
Tectonic Plate movement per year is measured in…
Centimeters
Asthenosphere is the layer over which…
The lithosphere floats/moves on it
Earthquake
Shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity.
Tectonic Plates
Sections of the Earths crust that move due to convection currents
What type of fault/boundary is this?
*One plate going under one going over.
Subduction Convergent
What type of fault/boundary is this?
*Two plates moving away from each other and a bump in the middle (mountains)
Divergent Boundary
Continental Crust
The relatively thick part of the Earth’s crust that forms the large landmasses. Lots of silica.
Inner Core
A dense sphere of solid iron and nickel at the center of the earth’s core.
The red highlighted area is the world’s longest mountain range lying under the water in the deep ocean. What is this mountain range/ridge called?
Mid-oceanic ridge
What type of fault/boundary is this?
*Two plates rubbing against each other (going opposite ways but touching)
Transform
Density
Mass per unit volume
All mid-oceanic ridges are called what type of boundary?
Divergent
Rift valley
A deep valley that forms where 2 plates move apart at a divergent boundary.
Mid-Oceanic Ridge
The longest mountain range in all the world; all along the center of the Atlantic Ocean; formed by active volcanoes through the sea floor spreading.
What type/boundary is this?
*Two plates going up against each other to make mountains
Convergent continental vs. continental
Transform Boundary
The boundary between tectonic plates that are sliding past each other horizontally.
Subduction Zone
In tectonic plates, the site at which an oceanic plate is sliding under, a continental plate.
Convection Currents
Circular currents in the mantle cause by magma being heated by the outer core.
Outer Core
A layer of molten iron and that surrounds the inner core of the earth.
Earth’s magnetic field that protects us from the sun’s solar winds is created by what layer?
Outer core
Asthenosphere
A soft layer of the mantle on which the lithosphere floats
What theory is responsible for explaining why the continents once touched?
Continental Drift Theory
Richter Scale
A scale that rates an earthquake’s magnitude based on the sizes of its seismic waves.
Ring of Fire
A major belt of volcanoes that rims the Pacific Ocean
As you go deeper into the earth the pressure…
Increases
Oceanic Crust
A thinner, more dense, younger crust making the ocean floor
Transform Boundary
A boundary between tectonic plates that are sliding past each other horizontally.
Lower Mantel
The portion of the mantle below a depth of about 600 miles.
Upper Mantel
The portion of the mantle above a depth of about 600 miles.
