Test Bank For Physical Geology 14th Edition by Plummer

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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. UnderstandTopic: Igneous Environments

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

Bloom’s Level: 1. RememberTopic: Igneous Environments

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

Bloom’s Level: 1. RememberTopic: 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. UnderstandTopic: Igneous Environments

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

Bloom’s Level: 1. RememberTopic: Igneous Environments

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

Bloom’s Level: 1. RememberTopic: Igneous Environments

7. Mafic igneous rocks are silica-poor.TRUE

Bloom’s Level: 2. UnderstandTopic: Igneous Environments

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

Bloom’s Level: 2. UnderstandTopic: Igneous Environments

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

Bloom’s Level: 2. UnderstandTopic: 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. RememberTopic: Igneous Environments

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

Bloom’s Level: 1. RememberTopic: Igneous Environments

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

Bloom’s Level: 1. RememberTopic: 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. UnderstandTopic: Igneous Environments

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

Bloom’s Level: 1. RememberTopic: Igneous Environments

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

Bloom’s Level: 1. RememberTopic: Igneous Environments

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