Tectonic plates Flashcards
What is the Earth’s surface separated into?
Tectonic plates
What is around the core?
Mantle
Does the mantle move fast or slow?
Very slow
What is the mantle made out of?
Semi-molten rock
What is the outer layer called?
The crust
Is the crust thick or thin?
Thin
What are the two types of crust?
Continental and oceanic
What are the two features of continental crust?
Thicker, less dense
What are the two features of oceanic crust?
Thinner, more dense
Why are the plates moving?
The rock in the mantle underneath the plates is moving
What are the place the plates meet called?
Boundaries or plate margins
What are the three types of plate margins?
Destructive, constructive and conservative
What are the two plates doing in a destructive margin?
Oceanic and continental are moving towards each other
What happens in a destructive plate margin?
The oceanic plate is more dense so it is forced down into the mantle and destroyed
What does the destructive margins create?
Volcanoes and ocean trenches