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Earthquakes and Volcanoes 03

Plate boundaries are restless zones where the Earth's crust moves, melts and erupts. This KS3 Geography quiz explores earthquakes, volcanoes and dramatic plate collisions.

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Fascinating Fact:

Where one plate is forced down under another, it melts and the molten rock can rise to the surface to create explosive volcanic eruptions.

In KS3 Geography, you study how tectonic plates move and interact. At some boundaries one plate is pushed beneath another, creating powerful earthquakes, chains of volcanoes and deep ocean trenches.

Key Terms

Tectonic plate: A large, rigid slab of the Earth's crust that slowly moves over the mantle.
Subduction zone: A plate boundary where one tectonic plate is forced down beneath another plate.
Magma: Molten rock beneath the Earth's surface that can rise to feed volcanic eruptions.

Frequently Asked Questions (Click to see answers)

What happens when one tectonic plate is forced under another?

When one plate is forced under another, it enters the mantle, begins to melt and can generate magma. This process can also trigger strong earthquakes along the plate boundary.

How do subduction zones cause volcanoes and earthquakes?

At subduction zones, plates grind together, causing earthquakes. As the descending plate melts, magma rises through cracks in the crust, forming volcanoes that may erupt explosively.

Where are subduction zones found in the world?

Subduction zones are common around the Pacific Ocean, including the west coasts of the Americas and areas near Japan and Indonesia, forming part of the Pacific Ring of Fire.

Try These Related Quizzes

1 .

Which volcanoes are formed from runny lava and have gently sloping sides?

Ash volcanoes

Composite volcanoes

Dome volcanoes

Shield volcanoes

Mauna Loa in Hawaii is an excellent example

2 .

Earthquakes on the seabed can cause what?

Origamis

Toonarmies

Tsunamis

Typhoons

They are huge tidal waves - tsunami means 'harbour wave' in Japanese

3 .

What is the underground point where an earthquake starts?

Focus

Genesis

Hub

Origin

The seismic waves travel outwards from the focus in all directions. That is why it is possible to detect an earthquake that has happened on the other side of the world

4 .

An earthquake sends out what type of waves?

Ascorbic

Pelagic

Seismic

Semitic

Seismic is Greek for 'shake'

5 .

The volcano that erupted in Washington state in 1980 was Mount what?

St Helens

St James

St Neots

St Swithins

It was a huge eruption - the mountain literally blew its top. After the eruption had stopped, the mountain was 400 m lower and had a crater at the top that was 2 - 3 km wide and about 700 m deep

6 .

What word describes the plates of the earth's crust?

Platonic

Subsonic

Technotronic

Tectonic

Movement of plates causes 'quakes and eruptions

7 .

Which is not a type of plate boundary?

Conservative

Constructive

Destructive

Distinctive

You don't usually get volcanoes at conservative plate boundaries

8 .

Where the edges of plates meet is called what?

Plate boundary

Plate border

Plate junction

Plate seam

Also known as a plate margin

9 .

Volcanoes that have erupted recently are called what?

Active

Alert

Effervescent

Vibrant

The closest active volcanoes to the UK are in Italy and in Iceland

10 .

What kind of volcanic 'flow' includes hot gas, ash and lava?

Hypocaustic

Panasonic

Pyroclastic

Pyrotechnic

A cloud of hot ash from an eruption of Mount Vesuvius in AD79 destroyed the town of Pompeii. The ash was so fine that the bodies of the victims were very well preserved

You can find more about this topic by visiting BBC Bitesize - Disasters and responses

Author: Jan Crompton (KS3 Geography & History Teacher, Professional Quiz Writer)

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