Question

1.Identify and describe the two primary factors that determine whether a volcanic eruption is relatively violent or not, and how these factors relate to the viscosity of a magma.

2.Identify and describe the threats posed by volcanoes, other than lava flows.

3.Name the three main types of volcanoes and describe how they are different (size, shape, eruption violence)

4.How are volcanic activity, in general, and plate tectonics related?

5.How can volcanoes be monitored in order to predict eruptions?

6.In the Vocab section, you are asked to define several intrusions (sills, dikes, laccoliths, batholiths). How are these similar and different from each other?

Answer 1

1.The factors responsible for determining whether an volcanic eruption is violent or not are Magma's temperature, it's composition and the amount of dissolved gases it contains.A volcanic eruption is more explosive if the lava or magma have higher viscosity.

2.Other than lava flows, the volcanoes have there's to human life.It will also affect environment by making it pollute. Excessive landslides can be the cause of heavy loss to houses, properties etc.

3.Three types of volcanoes are-

CINDER CONE VOLCANO-These are the simplest type of volcanoes. They occur when particles and bobs of the lava are erupted from volcanic vent.

COMPOSITE VOLCANO-These volcanoes are also known as strata volcanoes. These volcanoes have conduit system inside them that channels the magma from deep within the earth to the surface.

SHIELD VOLCANOES@These are the large ,broad volcanoes that look like shied from above.

5.Volcanoes often shows precursory activities before they erupts. Volcanologists can monitor these activities to forecast an eruption. This includes monitoring earthquakes using sesimometers.