Volcanoes🔥🌋 Flashcards
Why do Volcanoes occur?
They occur when two constructive or destructive plates meet and cause the fluid magma to rise and form a volcano!
What is a shield volcano?
A shield volcano is a low dome shaped volcano that produces runny lava and erupts for a long period of time!
What is a composite volcano?
A composite volcano is a cone shaped volcano which has violent eruptions and produces thick viscous lava! Made up of ash and lava
What is a dome volcano?
A dome volcano is a dome shaped volcano which produces just lava is steep sided and has rare but periodic eruptions!
How are volcanoes monitored?
With special instruments which measure the movement of the magma the changes in the slope of the volcano and seismic activity with seismometers to measure earthquakes and tremors and by testing gas emissions
What is a super volcano?
It is a volcano which produces an eruption 1000 times more powerful than a normal eruption and only erupts every few hindered thousand years
More about super volcanoes!?!?
Last eruption 640,000 years ago drop in temperature and affects globally!
What is a volcano?
A volcano is a is a mountains of rock created wen two constructive or destructive plates meet and the liquid magma rises ad over time creates a volcano!
Primary impacts of Montserrat?
- Large areas covered with volcanic material capital ( Plymouth) covered in mud and ash!
- schools hospitals and airports destroyed!
- 19 died and 7 injured
Secondary impacts on Montserrat?
- many building destroyed
- tourists stayed away and businesses destroyed disrupting the economy!
- volcanic ash improved soil fertility!
- once rebuilt tourism again increasing to see volcano!
Immediate responses to Montserrat?
- People were evacuated
- shelters built for the homeless
- the uk provided £17million
Long term responses for Montserrat?
- an exclusion zone was placed while the volcano was still active
- the Uk provided £41million to rebuild and develop the island
- a volcano observatory was set up to predict future eruptions
