Structure of the Earth
The thinnest layer of the Earth's Structure.
What is the crust?
Who linked continental drift and seafloor spreading?
Who is J. Wilson?
Where two plates meet and form lines of weakness.
What are plate margins/ boundaries?
A crack in the Earth's crust created from two plates sliding past each other.
What is a fault?
This part of the Earth's structure is broken into rigid pieces that float over the mantle.
What is the crust?
Where two plates slide past each other.
What are transform/ conservative plate margins/ boundaries?
Long narrow depression on the seafloor.
What is an oceanic trench?
As a result of extreme pressure this part of the Earth's structure is rigid.
What is the inner core?
The theory that the Earth contained one super continent that slowly drifted apart.
What is continental drift?
Where two plates move away from each other.
What are divergent/ constructive plate margins/ boundaries?
Where the Indo-Australian and the Eurasian plates meet.
This part of the crust is dense and is thinner.
What is oceanic crust?
The study of the plates which make up the Earth's crust, and how their movement affect rocks and landforms at the surface.
What is the theory of Plate Tectonics?
Where two plates move towards each other.
What are convergent/destructive plate margins/ boundaries?
Magma that flows out along the plate boundary on the ocean bed.
Convection currents move in this part of the Earth's structure.
What is the mantle?
What moves the plates?
What are convection currents?
The zone where one dense crust moves under a lighter crust.
What is the subduction zone?
When plates move apart and create new crust resulting in underwater mountains.
What are ridges?