Crust

Plate

Plate Margin

Mantle

Convection currents

Subduction

Collision

Fold mountains

Ocean trenches

Composite volcano

Shield volcano

Subsistence

Terraces

Irrigation

Hydroelectric power

Natural hazard

Primary effects

Secondary effects

Aid

Earthquake

Immediate responses

Long-term responses

Vent

Lahar

Supervolcano

Caldera

Fissures

Geothermal

Geyser

Hot spot

Earthquake

Focus

Richter Scale

Epicentre

Shock waves

Mercalli scale

Debt

The three Ps

Prediction

Protection

Preparation

Tsunami