Earth's layers
Plate tectonics
Boundaries
1

How many layers are they in the earth?

4

1

How deep are the tectonic plates?

 between 80 and 120 miles below the surface

1

What are the three main types of plate boundaries?

Convergent boundaries,Divergent boundaries,Transform boundaries.

567

When there is a volcanic eruption, what layer does magma come from?

the mantle
567

how old are plate tectonics

about 3 billion years

567

What are Divergent boundaries?

where two plates are moving apart

601

What layer is the thickest?

the core 

601

How big is the smallest tectonic plate

250,000 square kilometers

601

What are Convergent boundaries?

where two plates are colliding

899

What are the names of the 4 layers?

inner core,outer core,mantle,crust 

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Where are the largest tectonic plates located

Pacific Ocean

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What are Transform boundaries?

where plates slide passed each other

912

What layer is completely liquid?

outer core 

912
What plate is Tokyo on?

Eurasian plate

912

Which boundary creates mountains when it moves?

Convergent boundaries

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