Here is an opportunity for you to test your knowledge of the concepts covered in Chapter 3 of your text. Take some time to complete the exam below to see how much you have learned - OR GO SCRUB THE SHOWER!
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| 1 | |
A surface separating different types of rocks is called:
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| | A) | a xenolith |
| | B) | a contact |
| | C) | a chill zone |
| | D) | none of the above |
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| 2 | |
The major difference between intrusive and extrusive igneous rocks is:
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| | A) | where they solidify |
| | B) | their chemical composition |
| | C) | the type of minerals they contain |
| | D) | all of the above |
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| 3 | |
Which is not an intrusive rock type?
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| | A) | gabbro |
| | B) | diorite |
| | C) | granite |
| | D) | andesite |
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| 4 | |
By definition, stocks differ from batholiths in:
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| | A) | size |
| | B) | shape |
| | C) | chemical composition |
| | D) | elevation above sea-level |
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| 5 | |
On average, the geothermal gradient is about:
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| | A) | 1 degree Celsius per kilometer |
| | B) | 10 degrees Celsius per kilometer |
| | C) | 30 degrees Celsius per kilometer |
| | D) | 50 degrees Celsius per kilometer |
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| 6 | |
Which of the following minerals is part of Bowen's Continuous Series?
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| | A) | pyroxene |
| | B) | biotite |
| | C) | amphibole |
| | D) | plagioclase |
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| 7 | |
Which of the following minerals is part of Bowen's Discontinuous Series? |
| | A) | pyroxene |
| | B) | biotite |
| | C) | olivine |
| | D) | all of these are part of Bowen's Discontinuous Serires |
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| 8 | |
The difference in texture between plutonic and volcanic rocks is caused by:
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| | A) | different mineralogy |
| | B) | different rates of cooling and crystallization |
| | C) | different amounts of water in the magma |
| | D) | different chemical compositions |
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| 9 | |
A change in magma composition due to melting of surrounding country rock is called:
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| | A) | magma mixing |
| | B) | assimilation |
| | C) | crystal settling |
| | D) | differentiation |
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| 10 | |
Andesite is most often associated with what type of plate boundary?
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| | A) | divergent plate boundaries |
| | B) | transform plate boundaries |
| | C) | convergent plate boundaries |
| | D) | reversible plate boundaries |
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| 11 | |
You discover a rock with minerals large enough to be seen containing amphibole, biotite, and plagioclase. This is:
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| | A) | diorite |
| | B) | gabbro |
| | C) | granite |
| | D) | hornblende |
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| 12 | |
Bowen’s Reaction Series illustrates relations between:
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| | A) | temperature, viscosity, and mineral composition |
| | B) | temperature, chemical composition, and mineral structure |
| | C) | viscosity, temperature, silica content, and volatile content |
| | D) | temperature, pressure, and viscosity |
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| 13 | |
The two important criteria used for igneous rock classification are:
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| | A) | texture and temperature |
| | B) | mineral composition and temperature |
| | C) | temperature and viscosity |
| | D) | texture and mineral composition |
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| 14 | |
Basalt and gabbro:
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| | A) | have the same minerals |
| | B) | formed from magma with the same temperature |
| | C) | formed from magma with the same silica content |
| | D) | all of these |
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| 15 | |
A rock with mineral crystals too small to be seen and low temperature minerals is:
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| | A) | gabbro |
| | B) | rhyolite |
| | C) | andesite |
| | D) | granite |
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| 16 | |
Igneous rocks that form entirely beneath Earth's surface are said to be:
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| | A) | volcanic |
| | B) | extrusive |
| | C) | plutonic |
| | D) | platonic |
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| 17 | |
Andesite was named for a rock type commonly found:
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| | A) | in the Rocky Mountains |
| | B) | in Hawaii |
| | C) | in the Andes Mountains |
| | D) | in Mayberry, North Carolina |
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| 18 | |
Igneous processes are those which relate to:
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| | A) | melting of rocks |
| | B) | formation of magma |
| | C) | solidification of magma |
| | D) | all of these |
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| 19 | |
The geothermal gradient of the asthenosphere is:
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| | A) | the same as the temperature structure of the lithosphere |
| | B) | about 1 degree per kilometer. |
| | C) | the reverse of the geothermal gradient in the lithosphere |
| | D) | always changing as a result of plate tectonics |
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| 20 | |
Volcanic rocks are also:
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| | A) | Intrusive. |
| | B) | Plutonic. |
| | C) | Extrusive. |
| | D) | Explosive. |
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