Plate Tectonics Flashcards
How thick is the crust?
8.65 KM thick
What is the crust?
The outer layer of the earth that you live on. It’s a thin layer of rock.
What is the mantle?
It forms about half of the earth and is made of heavy rock. But below the rock is hot and soft like plastic, it’s liquid in some places
What is the upper mantle made of?
Hard rock
What is the lower part of the mantle made of?
Soft rock
What is the outer core made from?
Liquid which is iron and nickel
What is the inner core made from?
It’s solid a And iron and nickel
How many layers is earth made of?
4
What are plates?
The outer layers broken pieces
What crust is the main land?
The continental
How thick is the continental crust?
35 KM
What is the ocean floor made of?
The oceanic crust
What is thinner the continental crust or the oceanic crust?
The oceanic crust
What is the oceanic crust covered in?
A thin layer of ocean sediments
How thick is the oceanic crust?
5 KM
Where does the magma which feeds volcanoes come from?
The mantle
What is the hottest part of earth?
The core
How hot is the mantle?
1600*c
What is the upper mantle often described as?
Bendy plastic
How hot is the upper part of the mantle?
600-800*c
How thick is the mantle?
2800KM thick
How thick is the outer core?
2100KM thick
How hot is the outer core?
3000*c
How thick is the solid inner core?
1300KM thick
How hot is the inner core?
5000*c
What is the core?
Mainly iron, mixed with a bit of nickel. The outer core is liquid the inner core is solid
Where do earthquakes and volcanoes occur?
On or near plate boundaries
What are the 3 different plate boundaries?
Convergent
Divergent
Conservation
What is a divergent plate boundary?
When 2 plates have been pulled apart. This is how volcanoes and earthquakes happen
How many types of convergent plate boundaries are there?
2
What is one type of convergent plate boundaries?
When two plate boundaries (oceanic and continental) crash together and cause earthquakes and or volcanoes
What is the other type of convergent
When two plates meet and cause earthquakes and or volcanoes but they also make mountains
