Volcanoes Flashcards
What is a volcano
It’s a cone shaped hill or mountain formed when molten material from the mantle is forced through an opening.
Where do most volcanoes occur
Destructive and constructive plate boundaries
How many active volcanoes are there
About 500
How ,any volcanoes erupt each year
50
What are the 2 types of volcano
Shield volcanoes
Strato volcanoes
What is a shield volcano
A shield volcano is a type of volcano built from fluid lava flows.
100 miles wide
1000metres tall
What is a strato volcano
They are a volcano which have steep slopes that consist of many layers of hardened lava and volcanic ash.
5000m steep
10miles narrow
3 examples of volcanoes
Mt St Helens (USA), mt. Meripi (Indonesia) and mt. Ejya (Iceland)
Why is volcanic ash dangerous
It can cause damage and engine failure to air borne vehicles
What is pyroclastic flow
White hot avalanche of exploded roxks
What is Lahar
Volcanic mudflow.
Like flowing concrete
