Plate Tectonics

Question 1

What are the three plate margins

Answer 1

Constructive, destructive, conservative

Question 2

Constructive plate margins

Answer 2

Plates move apart at 2cm a year and magma rises to form new crust and volcanoes

Question 3

Destructive plate margins with two continental plates

Answer 3

They crumple upwards to create fold mountains which have no magma, so no volcanoes

Question 4

Destructive plate margins with an oceanic and continental plate

Answer 4

The oceanic plate is pushed under the continental plate because it is more dense (subduction)
The oceanic plate melts due to heat and friction which creates magma

Question 5

Destructive plate margins with two oceanic plates

Answer 5

The oldest plate is forced downwards because it is denser (subduction)
Molten rock cools rapidly

Question 6

Conservative plate margins

Answer 6

Plates move side by side either in opposite directions or in the same direction at different speeds. They get stuck as they slide past each other which releases pressure and creates friction