0460 IGCSE - 2.1.1 Plate Boundaries & Causes of Volcanoes

Transform faults are also known as what?

• Convergent boundaries

• Conservative boundaries

• Convection boundaries

• Constructive boundaries

Constructive boundaries have what hazards

• Earthquakes

• Pyroclastic Flows

• Volcanoes

• Low viscosity lava flows

This is an image of Mauna Loa, the worlds largest Shield Volcano. But what characteristics are shield volcanoes known for?

• Steep sides

• Being huge in size 100's of km's wide at base

• Layers of ash and cinders with lava

• Gentle sloping sides

What are the two types of convergent plate boundaries?

• Crumple zones

• Collision zones

• Cracked zones

• Subduction zones

Mount Sinabung is an example of what type of volcano?

• Caldera volcano

• Dome Volcano

• Fissure Volcano

• Stratovolcano

What is NOT a term of volcanic reference to its activity state

• Alert state

• Dormant

• Extinct

• Active

In your opinion, which of these volcanic hazards puts lives most at risk.

• Ashfall

• Pyroclastic flow

• Lava flow

• Lahaar / Mudflow

A lava dome is steep sided because of what?

• Low viscosity lava

• High pressure in asthenosphere

• Build up of friction

• Thick high viscous lava

What hazards are found at conservative boundaries

• Lava flows

• Pyroclastic flows

• Shallow strong earthquakes

• Ashflow

What causes a caldera to form?

• Over time rock erodes away so crater is hidden

• Sinking of volcanic crater after large eruption