Volcanoes Flashcards
what is a volcano
an opening in the Earth’s crust
allows hot magma, ash & gases to escape from below the surface
Which two plate boundaries create volcanoes
constructive (move apart)
&
destructive (move underneath)
What is a hotspot
at the centre of a plate where magma rises through the crust to form volcanoes
Where and what is the magma chamber
large underground pool of magma
beneath the volcano
What is the crater
opening of the volcano
What is a volcanic cloud
Gas, steam & ash escaping the volcano
What are volcanic bombs
Large pieces of rock thrown from the volcano
What is the main vent
central tube which magma rises through
to the top of the volcano
What is the secondary vent
opening on the side of the volcano
allowing magma to escape
Why does magma escape from the
secondary vent
a really high build up of pressure
What does it mean when a volcano is inactive?
It won’t erupt
What physical structure can volcanoes form?
islands
like Hawaii, Galapagos, Canary islands
