Starter quiz
- Which layer of Earth is composed mostly of solid iron and nickel?
- Crust
- Mantle
- Outer core
- Inner core ✓
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- What is a cause of tectonic plate movement?
- Wind currents
- Convection currents in the mantle ✓
- Earth's rotation
- Gravitational pull from the moon
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- Which of the following is a result of tectonic plate movement?
- Earthquakes
- Volcanic eruptions
- Mountain building
- All of the above ✓
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- What type of volcano erupts gently and has broad, sloping sides?
- Composite volcano
- Shield volcano ✓
- Stratovolcano
- Caldera
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- What is the main reason for the occurrence of tsunamis?
- Earthquakes in the ocean ✓
- Meteorite impacts
- Coastal erosion
- Volcanic eruptions on land
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- Which of these statements are true?
- A natural hazard is an event that always causes damage
- A natural disaster causes significant damage to human lives or property ✓
- Natural disasters happen anywhere in the world
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Exit quiz
- Match the keywords and their definitions.
- subduction⇔when one tectonic plate is forced under another plate ✓
- tsunami⇔a giant ocean wave caused by underwater earthquakes ✓
- magnitude⇔a measure of the energy released by an earthquake ✓
- What happens at a destructive (convergent) plate margin?
- Plates move apart
- Plates slide past each other
- Plates move towards each other ✓
- Plates move in a circular motion
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- Put the sentences in the correct order to describe the formation of volcanoes at a destructive plate margin.
- 1⇔When a plate is subducted into the mantle, it heats up.
- 2⇔This helps the rock above to melt and form magma.
- 3⇔This magma rises up through cracks in the crust, causing volcanic eruptions.
- 4⇔Over time, layers of lava and ash build up to form a volcano.
- 5⇔Volcanoes at destructive plate margins produce explosive eruptions.
- Explosive volcanic eruptions produce a range of very dangerous hazards, including:
- pyroclastic flows
- ash clouds
- lava flows
- lahars
- all of the above ✓
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Worksheet
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Lesson Details
Key learning points
- Destructive/convergent plate margins involve two plates moving towards each other.
- Distinctive processes occur at destructive/convergent plate margins.
- Earthquakes and volcanic eruptions occur at destructive/convergent plate margins and have distinctive characteristics.
Common misconception
That volcanoes occur directly above where the oceanic plate starts to subduct.
In fact, the melting of the oceanic plate occurs deep in the mantle, so magma rises to the surface some distance away from the plate margin.
Keywords
Subduction - the process at a destructive plate margin where a denser oceanic plate sinks beneath a less dense plate into the mantle
Tsunami - a series of large ocean waves caused by underwater earthquakes, volcanic eruptions or landslides
Magnitude - a measure of the energy released by an earthquake; a higher magnitude means a stronger earthquake
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