restless earth Flashcards
What is at the centre of the Earth?
The Core made of iron and nickel
What is around the core?
Mantle made of semi molten rock
What are the 2 types of tectonic plates?
continental and oceanic
How do the earths plates move?
because the rock in the mantle is moving underneath
What is where the plates meet called?
boundaries and plate margins
How many plate margins are there?
3 destructive, constructive and conservative
What happens when the oceanic plate meets the continental plate?
oceanic plate is forced down into the mantle and destroyed
When the oceanic plate is forced into the mantle what could it create?
volcanoes and ocean trenches.
what happens when constructive margins move away from each other?
magma rises and fills the gap
What is conservative margins?
2 plates moving past each other, or in the same direction but different speeds
What happens to sedimentary rock when tectonic plates collide?
folded and forced upwards to form mountains
Where are fold mountains found?
destructive plate margins
How were the Andes in South America formed?
continental and oceanic plate colliding
How were the Himalayas in Asia formed?
2 continental plates colliding
Ways humans use fold mountains?
farming, mining, tourism, forestry and hydro-electric power
