8.A questions - Pt. 2

Question 1

Why is a volcano an extrusive igneous feature rather than an intrusive one?

Answer 1

Because volcanoes form outside the earth’s crust.

Question 2

How does the amount of silica in lava affect its viscosity and the temperature at which it melts?

Answer 2

The more silica in lava the slower and the thicker it becomes, and the less silica the more runny and fast it becomes.

Question 3

What is the main difference between the types of solid volcanic emissions?

Answer 3

Size.

Question 4

What is the Pacific Ring of Fire?

Answer 4

(The Circum-Pacific volcano belt) Where most of the tectonic plates that make up the Pacific basin are subducting beneath adjacent continental plates.