Tectonic Hazards

Question 1

Distribution of earthquakes and volcanoes.

Answer 1

Either on or near plate boundaries

Earthquakes are most frequent along major destructive plate margins- nazca plate and South American plate.

Question 2

Destructive plate boundaries

Answer 2

• Plates move together
• Lighter continental crust stays on top
• Denser oceanic crust is subsisted into mantle- melts
• Rising magma from meting crust can cause composite volcanoes
• Energy builds up in the subduction zone = released as violent eruptions - feature pyroclastic flows- form steep sided volcanoes made from layers of ash and lava