2.1 Tectonic processes affecting the magnitude of earthquakes

What are the deep fractures in the Earth’s crust called?

• Volcanoes

• Mountains

• Canyons

• Faults

What causes stress to build up along a fault?

• Tectonic forces

• Wind erosion

• Rainfall

• Volcanic eruptions

Label the diagram:

a

b

c

d

Seismic waves

Fault

Epicentre

Focus

What is the point in the Earth’s crust where seismic waves are released known as?

• Epicentre

• Focus

• Ridge

• Crater

Where is the shaking felt more strongly during an earthquake?

• Epicentre

• Mid-ocean ridge

• Plate boundary

• Magma chamber

What is the energy released by an earthquake also known as?

• Epicentre
• Focus
• Magma
• Seismic waves

Label the diagram:

a

b

Epicentre

Focus

_____ is the point in the Earth's crust where seismic waves are released.

_______ waves refer to the energy released during an earthquake.

Earthquakes refer to the shaking of the Earth’s ground due to the sudden release of ______ in the Earth's lithosphere.