Test Bank For Physical Geology 14th Edition by Plummer

Test Bank For Physical Geology 14th Edition by Plummer

Chapter 03

Igneous Rocks, Intrusive Activity, and the Origin of Igneous Rocks

  True / False Questions

1. Rhyolite is considerably more common than granite.
FALSE

Bloom’s Level: 2. Understand
Topic: Igneous Environments

2. Diorite and andesite are composed of similar amounts of feldspars and ferromagnesian minerals.
TRUE

Bloom’s Level: 1. Remember
Topic: Igneous Environments

3. Lava is magma on the Earth’s surface.
TRUE

Bloom’s Level: 1. Remember
Topic: Igneous Environments

4. Extrusive igneous rocks are typically fine grained because they crystallized slowly, deep below the Earth’s surface.
FALSE

Bloom’s Level: 2. Understand
Topic: Igneous Environments

5. A dike is a discordant intrusive igneous structure.
TRUE

Bloom’s Level: 1. Remember
Topic: Igneous Environments

6. The geothermal gradient is the rate at which pressure increases with increasing depth beneath the surface.
FALSE

Bloom’s Level: 1. Remember
Topic: Igneous Environments

7. Mafic igneous rocks are silica-poor.
TRUE

Bloom’s Level: 2. Understand
Topic: Igneous Environments

8. A mineral’s melting point generally increases with increasing pressure.
TRUE

Bloom’s Level: 2. Understand
Topic: Igneous Environments

9. Although batholiths may contain mafic and intermediate rocks, they almost never composed of granite.
FALSE

Bloom’s Level: 2. Understand
Topic: Igneous Environments

10. The sequence in which minerals crystallize in a cooling igneous melt is called Bowen’s Reaction Series.
TRUE

Bloom’s Level: 1. Remember
Topic: Igneous Environments

11. The continuous branch in Bowen’s Reaction Series contains the ferromagnesian minerals.
FALSE

Bloom’s Level: 1. Remember
Topic: Igneous Environments

12. A pluton is an igneous structure that crystallized at very shallow depths.
FALSE

Bloom’s Level: 1. Remember
Topic: Igneous Environments

13. Partial melting of the lower continental crust produces a silicic magma that eventually solidifies into granite or rhyolite.
TRUE

Bloom’s Level: 2. Understand
Topic: Igneous Environments

14. An ultramafic rock is composed almost entirely of quartz.
FALSE

Bloom’s Level: 1. Remember
Topic: Igneous Environments

15. The term mafic comes from the terms magnesium and ferric.
TRUE

Bloom’s Level: 1. Remember
Topic: Igneous Environments