3. These are rocks which are rich in pyroxene and olivine minerals.
A. peridotite and dunite
B. gabbro and basalt
C. diorite and andesite
D. rhyolite and granite



4. Which of the following rocks has many trapped bubbles from gas escape?
A. granite
B. scoria
C. basalt
D. obsidian


5. Which of the following has contact with magma?
A. hornfels
B. slate
C. gneiss
D. schist

10. Which of the following is INCORRECT as to the process of metamorphism? A. granite: gneiss
B. shale: slate
C. sandstone: gneiss
D. limestone: marble

18. What type of igneous rock texture has large minerals?
A. basalt
B. granite
C. obsidian
D. pumice

19. Which of the following has low density?
A. pegmatite
B. gabbro
C. rhyolite
D. diorite

20. Which of the following is NOT true about extrusive rocks?
A. plutonic
B. dense
C. cools slowly
D. contains Mg and Fe


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