Have an account?
Skip to Content
Build your own quiz
20 questions
Show Answers
See Preview
- 1. Multiple Choice
A fine-grained igneous rock was probably formed by
weathering and erosion
great heat and pressure that did not produce melting
rapid cooling of molten material
slow cooling of molten material
- 2. Multiple Choice
Which processes lead directly to the formation of igneous rock?
Intrusive and extrusive
lava and magma
heat and pressure
crystallization and solidification
- 3. Multiple Choice
Obsidian's glassy texture indicates that it formed
slowly, deep below Earth's surface
slowly, on Earth's surface
quickly, deep below Earth's surface
quickly, on Earth's surface
- 4. Multiple Choice
Which texture best describes an igneous rock that formed deep underground?
glassy
vesicular
fine grained
coarse grained
- 5. Multiple Choice
Which graph best represents the relative densities of three different types of igneous rock?
A
B
C
D
- 6. Multiple Choice
The diagrams below show the crystals of four different rocks viewed through the same hand lens. Which crystals most likely formed from molten material that cooled and solidified most rapidly?
A
B
C
D
- 7. Multiple Choice
Which graph best represents the relationship between the length of time molten magma takes to cool and the size of the crystals in the rock formed by the magma?
A
B
C
D
- 8. Multiple Choice
Select ALL Possible:
Extrusive Rock Textures
Fine
Coarse
Glassy
Very Coarse
Vesicular
- 9. Multiple ChoiceIgneous rock that forms from lava on Earth's surfaceOrganic RockIntrusive RockClastic RockExtrusive Rock
- 10. Multiple Choice
Which igneous rock is dark colored, cooled rapidly on Earth's surface, and is composed mainly of plagioclase feldspar, olivine, and pyroxene?
obsidian
rhyolite
gabbro
scoria
- 11. Multiple Choice
Which igneous rock has a vesicular texture and contains the minerals potassium feldspar and quartz?
andesite
pumice
scoria
pegmatite
- 12. Multiple Choice
Which intrusive igneous rock could be composed of approximately pyroxene, plagioclase feldspar, olivine, and amphibole?
granite
peridotite
gabbro
basalt
- 13. Multiple Choice
Compared to felsic igneous rocks, mafic igneous rocks contain greater amounts of
white quartz
aluminum
pink feldspar
iron
- 14. Multiple Choice
An extrusive igneous rock with a mineral composition of quartz, potassium feldspar, plagioclase feldspar, biotite, and amphibole is called
rhyolite
granite
basalt
basaltic glass
- 15. Multiple Choice
Which two igneous rocks could have the same mineral composition?
rhyolite and diorite
pumice and scoria
peridotite and andesite
gabbro and basalt
- 16. Multiple Choice
Which minerals are present in granite but are NEVER present in gabbro?
quartz and plagioclase feldspar
potassium feldspar (orthoclase) and quartz
plagioclase feldspar and potassium feldspar (orthoclase)
biotite mica and hornblende amphibole
- 17. Multiple Choice
Olivine and pyroxene are commonly found in igneous rocks that are
felsic, with low density
felsic, with high density
mafic, with low density
mafic, with high density
- 18. Multiple Choice
The best evidence for determining the cooling rate of an igneous rock during its solidification is provided by
the number of fossils
the color of the rock
the crystal size of its minerals
the density (weight) of the rock
- 19. Multiple Choice
Which TWO properties would be MOST useful for identifying igneous rocks?
number of fossils
mineral composition
number of minerals present
rock texture
- 20. Multiple ChoiceIgneous rock that forms when magma hardens beneath Earth's surfaceintrusive RockcompactionChemical RockClastic Rock
- Answer choicesTagsAnswer choicesTags