Volcanoes form when magma reaches the Earth's surface, causing eruptions of lava and ash. Find out about different types of volcano, how to measure their strength and preparing for volcanoes.
What is a volcano?
The movement of the Earth's crust by the movement of plate boundaries
A cone-shaped mountain or hill formed by eruptions of lava and ash
A mountain created by the folding of the Earth's crust
Where do volcanic eruptions tend to take place?
Conservative plate boundaries
Destructive plate boundaries
Constructive and destructive plate boundaries
A volcano that is flat and wide is called:
A cone volcano
A shield volcano
A composite volcano
A cone volcano is most commonly found at which type of plate boundary?
Which type of volcano often erupts with a mix of steam, ash, rock and dust, causing a pyroclastic flow?
Which of the statements listed below is NOT a positive aspect of a volcanic eruption?
Lava flows and lahars (mud flows) clear areas of woodland, agriculture and destroy settlements
The lava and ash deposited during a volcanic eruption breaks down to provide valuable nutrients for the soil
The dramatic scenery created by volcanic eruptions attracts tourists
Which of the following is NOT a short-term response to an eruption?
Evacuating people who may be affected by the eruption
Building a volcanic observatory
Aid from abroad
A volcano which erupts 1000 km3 of material is called:
A small volcano
A supervolcano is shaped like:
An example of a supervolcano is: