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What are the names of the 4 layers of Earth?
Lithosphere, Asthenosphere, outer core, inner core
How many layers does the Earth have?
4
Tectonic plates are located in the _________.
Lithosphere
Explain how tectonic plates were created
The asthenosphere (mantle) is beneath the lithosphere and it is very large, hot and rocks are always moving causing the lithosphere to crack.
When did tectonic plates happen?
At the end of the Triassic period.
When were tectonic plates discovered?
1872
When were the tectonic plates actually mapped?
1950s
Tectonic plates move about________ per year.
2.5 centimeters
When all continents were together, it was called
Pangea
It took _____ million years for continents to look like they do today
200 million years
Name two consequences of tectonic plates moving
continental drift, earthquakes, tsunamis
You can see the Mid-Atlantic Ridge in this country
Iceland
Describe the Mid-Atlantic Ridge
The Mid-Atlantic Ridge is where seafloor spreading takes place in the middle of the Atlantic Ocean. They create the tallest mountains.
What are the 3 types of tectonic plates movement?
divergent, convergent, transform
How do divergent plates move?
plates move away from each other creating new land
How do convergent plates move?
One plate goes underneath the other one and is consumed by the mantle
How do transforming plates move?
Plates slide past each other without creating or destroying the lithosphere