1.6 Volcanic characteristics, distribution

Question 1

What are shield volcanoes

Answer 1

Shield volcanoes are volcanoes which have non acidic and very runny lava, less violent eruptions, shorter periods of time between eruptions and can be found on constructive plate margins.

Question 2

what are Composite Volcano

Answer 2

Composite Volcano are volcanoes which have very viscous and acidic lava, violent eruptions, alternating layers of ash and lava, longer time between eruptions and can be found on destructive plate margins.

Question 3

what to people use to measure the explosiveness of a volcanoes

Answer 3

The VEI (Volcanic Explosivity Index) on a scale of 1 to 8

Question 4

what do people use to perdict volcanoes

Answer 4

Tiltmetersand GPS satellites – these devices monitor any changes in landscape shape. Volcanoes tend to swell near an eruption
Monitoring gases escaping from a volcano using robots called Spiders – often there is an increased release of sulphur dioxide near an eruption
Thermal imaging to measure temperature changes - volcanoes become hotter when magma starts to rise through themain vent