Volcanoes

Question 1

Describe the distribution of volcanoes around the globe

Answer 1

Found at destructive and constructive plate boundaries, linear distribution

Question 2

What is a volcano?

Answer 2

A mountain or hill from which lava, molten rock, hot vapour and ash erupt from the earths crust

Question 3

Why do they erupt?

Answer 3

Pressure in the magma chamber gets too much and the gases cannot escape

Question 4

Explain the differences between composite (cone) volcanoes and shield volcanoes

Answer 4

shield volcanoes
erupt for a long period of time, wide flow, runny lava (basaltic rock)
whereas
composite volcanoes have violent eruptions, found at only destructive boundaries and have viscous lava

Question 5

Name the characteristics of a volcano

Answer 5

magma chamber, fumarble, parasitic cone, main vent, crust and crater

Question 6

Describe the primary effects of a volcanic eruption ( use case study!!!!)

Answer 6

2/3 of the island covered in ash, floods as valleys were blocked with ash, farmland destroyed, forest fires, population evacuated,19 dead, schools and hospitals demolished

Question 7

How are volcanoes monitored?

Answer 7

Montserrat is monitored by seismometers, placed around the volcano - measures movement of the ground. Also the gases let off by a volcano are tested- higher the sulphur content the closer the eruption

Question 8

Why are volcanoes monitored?

Answer 8

so that we can predict the next eruption and save economy, lives and the environment

Question 9

secondary effects

Answer 9

secondary - less tourism, harsh living condition, transport link damaged, population left island

Question 10

How is a super volcano different from a regular volcano?

Answer 10

Super volcanoes cover 100 miles or more, 1 million times more powerful than atomic bomb

Question 11

Describe the local, national and global impacts of an eruption

Answer 11

super volcano - globe at risk

Yellowstone - create islands, lung diseases, animal extinction, kills plants