Plate boundaries Flashcards
Can we predict what formations and hazards will occur in an area?
yes
What does the continental crust have a lot of what?
quartz
What’s the average density of a continental crust?
2.6 g/ cm3
What does the oceanic crust have a lot of what?
mafic/ basalt
What’s the average density of an oceanic crust?
3 g/ cm3
When two continental crust with the same densities collide what do they form?
mountains
When two continental crust with different densities collide what do they form?
volcanoes
How do plate tectonic plates move?
By the Convection currents
Which rocks are more dense? hot or cooler rocks.
Cooler
What are some examples of divergent plate boundaries?
Mid-ocean ridges
What are some examples of convergent plate boundaries?
The Himalaya mountains
What are some examples of a subduction zone?
trenches
What are some examples of transform plate boundaries?
San Andres Fault, in California
Do the convection currents go in the same direction as the tectonic plate boundaries?
yes
What do volcanology maps tell us?
That volcanoes are abundant along the west coast