Constructive Plate Boundaries

Question 1

What happens at constructive plate boundaries

Answer 1

Plates moving apart

Question 2

Why do plates move apart

Answer 2

Due to convection currents in mantle of earth

Question 3

What happens when plates move apart slowly

Answer 3

Magma rises from mantle
Magma erupts to surface of earth
Also earthquake occur

Question 4

What happens when magma reaches surface

Answer 4

Cools and solidifies to form new crust

Process is depleted over long time

Question 5

New rock builds up to form…..

Answer 5

Volcano

Question 6

Where are constructive plate boundaries usually found

Answer 6

Under sea

Question 7

Example of a constructive plate boundary

Answer 7

Mid Atlantic ridge

Question 8

As plates move away what happens to gap left

Answer 8

Filled with magma rising up from mantle to form volcanoes

Question 9

What happens at a destructive plate boundary

Answer 9

Plates moving apart creating constructive plate boundary
Happens under sea
When plates pull away cracks and fractures are formed between plates
Magma forces its way into cracks and surface to form volcanoes
New land formed and plates pull away= volcanic islands