Volcanoes Flashcards
Where do volcanoes occur?
When plates collide or separate
Where does most volcanic activity occur?
Over 90% of all volcanic activity happens at the pacific ring of fire
What is a mid ocean ridge?
It is when plates are pulling apart allowing magma to come up and create new land
What is a hotspot?
an area of the Earth’s mantle from which magma rises upward, forming volcanoes on the overlying crust
What is an active volcano?
It is a volcano that is continuously erupting
What is a dormant volcano?
It is a volcano that has not erupted in a long time but still could erupt
What is an extinct volcano?
It is a volcano that has not erupted for at least 10,000 years and is not expected to ever again
What is silica’s effect on an erupting volcano?
It can make the eruption more explosive
How long did the Iceland eruption last for?
It lasted for 6 weeks
When did the Iceland eruption happen?
It erupted on the 14th of April 2010
