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Starting Point-Teaching Entry Level Geoscience > ConcepTests > ConcepTest Examples > ConcepTest: Cooling History of Magma #1
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ConcepTest: Cooling History of Magma #1

ConcepTest questions by David McConnell , David Steer , Walter Borowski, Jeffrey Dick, Annabelle Foos, Jeffrey Knott, Alvin Konigsberg, Michelle Malone, Heidi McGrew, Kathie Owens, and Stephen Van Horn

Question:

The lines shown on the idealized graph below illustrate the cooling histories for the four magmas listed below, i.e., the lines illustrate how magma temperature decreased with time. What rock is best represented by cooling history A?

a. andesite porphyry
b. gabbro
c. basalt
d. obsidian

Cooling History of Magmas

Student Responses:

No data yet. The correct response is D.

If you would like to help acquire more Before and After statistics for this example, please contact the authors (see link at top of page).

References and Notes:


Subject

Geoscience:Geology:Igneous and Metamorphic Petrology

Resource Type

Activities:Classroom Activity:Short Activity:ConcepTests

Grade Level

College Lower (13-14):Introductory Level

Ready for Use

Ready to Use

Earth System Topics

Solid Earth:Igneous Processes, Earth Materials:Rocks

Topics

Solid Earth:Petrology