Earths Internal Structure Flashcards
This is the outermost layer of the earth, this part which we step on, is made up of hard solid rock with soil on the topmost part this extends from the continental part of the earth to the oceanic part.
Crust
This layer is divided into the upper mantle and the lower mantle this is not liquid it behaves like a plastic because the rocks are exposed in increasing pressure the mineral and chemical components may vary due to pressure
Mantle
This is the inner part of the earth which consist mostly of iron with some amount of nickel this is subdivided into the liquid outer core and the solid inner core
Core
What are the four compositional layers of the earth?
Crust
Mantle
Outer core
Inner core
This is the rigid outer layer of the earth this includes the crust and the uppermost mantle.
Lithosphere
This is below the lithosphere where the convection of molten rocks happens
Asthenosphere
This is broken into fragments of large slab of rocks
Tectonic plates
It is the result of differential heating when the materials in the mantle move downward near the core it will experience more heat
Convection current
He is a german geophysis that theorized the continental drift theory
Alfred Wegener
The continents were once joined as a single supercontinent that is called?
Pangea
This explains the formation the movement and the changes of the outer rigid layers of earth
Plate tectonics
He is an american geologist that theorized the seafloor spreading
Harry Hammond Hess
This constantly forms new crustal materials usually from volcanic action
Seafloor spreading
This is underneath the seafloor and rises and fills the gap forming new ocean floor
Magma
This forms continuously at the crust of the mid-ocean ridge
New oceanic crust
These are long high and continuous change of mountains that seem to run around earth
Oceanic ridges
This is one such oceanic ridge that is located at the center of the atlantic ocean basin
Mid-atlantic ridge
What are the three interactions of plate boundaries?
Divergent boundary
Convergent boundary
Transform boundary
This boundary exist between two plates that move apart
Divergent boundary
This boundary lies between two tectonic plates moving towards each other
Convergent boundary
This boundary are two tectonic plates slide past each other horizontally
Transform boundary
This is form as result of oceanic oceanic convergence
An island arc
This is formed as a result of oceanic continental convergence
A volcanic arc
It is the collision of two continental plates
Mountain ranges
