Restless Earth 2
- Created by: sophie.rebecca_
- Created on: 21-04-16 17:05
View mindmap
- Restless Earth 2
- What did the continents used to be like? How do we know this?
- One huge 'Super continent' called Pangea, we know because of fossils found and layers of rock on previously joined continents.
- What are tectonic plates, how many are there and what is it called where two meet?
- Pieces of crust that fit together to form the whole crust, 15 large and 20 small, they meet at 'plate boundaries'.
- What are the different types of plate boundary?
- Constructive, destructive, collision zones and conservative
- What happens at a constructive plate boundary?
- Plates move apart, magma rises and new crust is formed, small earthquakes and not very dangerous volcanoes.
- What happens at destructive plate boundaries?
- oceanic crust is destroyed via subduction, as it slides under a continental plate and it is melted and becomes hot magma, which can then rise to erupt from a volcano.
- What are tectonic hazards and where do they occur?
- Earthquakes and volcanoes, at plate boundaries, different types of boundary have different hazards.
- What happens at conservative plate boundaries?
- Plates slide past each other, high magnitude earthquakes, no volcanoes.
- What are collision zones and what happens there?
- Type of destructive boundary, form mountain ranges, where two continental plates collide and push up to form mountains. Earthquakes happen here.
- How do earthquakes occur?
- Caused by friction as plates tear apart.
- What did the continents used to be like? How do we know this?
Comments
No comments have yet been made