Plate Boundary Theories
What have the continents done over time to form their current position
What is shifted?
Plates colliding
Converge
The process of divergent boundaries moving apart is called?
Sea-floor spreading
Where are plate tectonics located?
Everywhere
Alfred Wegener
Who was the continental drift developed by?
Plates dividing
Diverge
How many continents are there?
7
How many tectonic plate boundaries are there in Australia?
0
Sea-floor spreading was discovered by
Harry Hess
Plates sliding
Transform
Magma was rising and sinking in the mantle
What is convection?
Forms on a continent at a Subduction zone
What are Volcanoes?
Tectonic plates are able to move because the Earth's lithosphere has a higher strength than the underlying...
asthenosphere
T/F plate tectonics move metres per year
False
What is the ring of fire?
A long chain of volcanoes that surround the pacific ocean.
The Earth's outer crust is divided into several plates that glide over the plastic-like and less rigid upper mantle.
What is The Theory of Plate Tectonics?
One example of a divergent boundary on land
Great Rift Valley in Africa
Plate Tectonic Movements are generated by the movement of what?
Convection currents in the mantle