Chapters 4 thru 8

Question 1

What are the three primary components of magma?

Answer 1

Magmas consist of three materials:
- melt (liquid component)
- crystals of silicate minerals (solid component)
- volatiles (gas component)

Molten rock when cooled solidifies into igneous rock

Question 2

What are the four basic igneous compositions?

Answer 2

Felsic
Intermediate
Mafic
Ultramafic

Question 3

What are the six major igneous textures?

Question 4

What are the major processes that generate magma from solid rock?

Question 5

How does magmatic differentiation generate a magma body with different chemical composition from its parent magma?

Question 6

How does partial melting of the mantle rock peridotite generate a mafic (basaltic) magma?

Question 7

What are the five intrusive igneous structures?

Answer 7

Dikes
Sills
Batholiths
Stocks
Laccoliths

Question 8

What is Geothermal energy?

Answer 8

Heat capture from Earth in the form of hot water or steam that is used to produce electricity.

Question 9

What is the source of geothermal energy?

Answer 9

Hot igneous rocks below the surface of Earth’s crust.

Question 10

Which is a renewable energy that is less polluting?

Geothermal
Fossil fuel-derived

Answer 10

Geothermal

Question 11

Name a volcano that is comprised of igneous rock?

Answer 11

Mount Rainier

Question 12

Igneous rocks are a major constituent of Earth’s?

Answer 12

Crust and Mantle