ion 2. Multiple Choice. For each statement below, circle the letter next to the

Question

ion 2. Multiple Choice. For each statement below, circle the letter next to the bess 1. Most magmas that rise slowly through the continental crust chemically evolve to become a. more mafic b more felsic c. more catastrophic d. more ultramafic 2. The kind of pluton that describes the Sierra Nevada and the Peninsular Ranges in California is a a. dike c. batholith d. laccolith 3. Volcanic hazards include a. lava flows b PyTOclastic flows c. lahars d. all of the above 4. Physical processes that loosen rocks include a. b. c. d. salt wedging frost wedging root wedging all of the above 5. Chemical weathering involves a. rocks dissolved by water b. rocks dissolved by magma c. rocks dissolved by movement along the San Andreas Fault d. rocks dissolved by asteroids Page 2 of 5

Explanation / Answer

1) B--More felsic ( initially it is mafic and with the crystallisation of ferromagnesium mineral it changes to more felsic or evolve to felsic

2) C - Batholith (The Sierra Nevada Batholith is a large batholith which forms the core of the Sierra Nevada mountain range in California, exposed at the surface as granite)

3) D - all of these

lava flows , pyroclastic flow and lahar adds to the hazards related to volcanic

4) D -- all of these ( all of these wedging process breaks the rock)

5) A - Rock dissolved by water ( Acidic water leads to chemical reaction)

6) D -- all of these ( slope , time and climate all adds to the formation of soil)

7) B - Bed ( it is a sedimentary unit formed )

8) C -clastic sedimentary rock

9) D - Petrified wood

10) D- halite

11) C - compaction or cementation

12) A - stream glaciers and wind

13) C-- deep burial ( compaction is necessary to form sedimentary rock)

14) B -- coal is a organic sedimentary rock formed of the vegetation which is made up of carbon

15) C -- Acuumulated shells and old coral reefs

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