Plate Boundaries

Question 1

4 layers of the earth

Answer 1

Inner core
Outer core
Mantle
Crust

Question 2

What are the nine major world plates

Answer 2

Pacific plate
North American plate
South American plate
Nazca plate
Euraisian
African plate
Indian plate
Indo - Australian plate
Antarctic plate

Question 3

What are the three different types of p,ate boundaries ?

Answer 3

Destructive (convergent)
Constructive (divergent)
Transform (conservative or passive constructive)

Question 4

What is subduction

Answer 4

Convection happens when two plates collide forcing one plate up and the other down. The magma in the earths mantle melts and is recycled into the mantle. This is called subduction

Question 5

What is a destructive plate boundary

Answer 5

When two plates collide forcing one up and the other down. The plate that is forced down is then recycled into the magma. Eg. The pacific ring of fire

Question 6

What is a constructive plate boundary

Answer 6

When two plates pull apart. Magma rises cools and becomes basalt rock then new crust is formed. Eg.The mid Atlantic ridge

Question 7

What is a transform plate boundary

Answer 7

When two plates slide past each other. Eg. The San Andreas fault line