Session 6 - Lesson 1 - Tectonic Hazards

1. Draw a destructive plate boundary (subduction zone).

Answer explanation

Remember to consider that as the oceanic plate slides underneath the continental plate (as it is less dense), melting under high heat and pressure to cause violent eruptions.

The oceanic plate slides beneath the continental plate at a subduction zone because it is ____ dense.

Answer explanation

The more dense oceanic plate is made of younger rock such as basalt.

Which plate boundaries are associated with violent earthquakes?

• Destructive

• Conservative

• Constructive

• Collision Zone

How many people were killed in the Chile earthquake?

• 600

• 550

• 500

• 450

The estimated cost of the Nepal earthquake was US$___ billion.

On which type of plate boundary would you find the Mid-Atlantic Ridge?

• Collision zone

• Subduction zone

• Conservative

• Constructive

What type of strategy is the use of earthquake drills in schools? (in reducing risk of tectonic hazards)

• Monitoring

• Planning

• Protection

• Prediction

Explain why volcanic areas are suitable for farming.

A ____ is used to measure seismic waves, which can help monitor earthquake zones and volcanoes for activity.

Answer explanation

A seismograph is what a seismometer creates.

Which of the following is NOT a secondary effect of the Nepal earthquake?

• Electricity, water supplies and sanitation systems were affected

• Avalanches on Mount Everest killed at least 19 people

• Tourist numbers shrank during the following year, leading to economic losses for the tourism industry.

• A landslide blocked the Gandaki River, leading to evacuations as the risk of flooding increased.