Rocks and Minerals

Quiz
•
Science
•
8th Grade
•
Medium
Standards-aligned

Samantha Russo
Used 4+ times
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which mineral can scratch plagioclase feldspar?
amphibole
calcite
dolomite
quartz
Answer explanation
On p. 16 of ESRT, quartz is the only mineral that is harder than plagioclase feldspar listed.
Plagioclase feldspar has a hardness of 6, and quartz has a hardness of 7, so quartz must be able to scratch plagioclase feldspar.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do sedimentary rocks form?
heat and/or pressure
compaction and/or cementation
melting and solidification
metamorphism
Answer explanation
On page 6 of ESRT, the only processes that lead to the formation of a sedimentary rock are compaction and/or cementation.
compaction = squeezing sediments together
cementation = gluing them together
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which minerals bubble when a drop of acid is placed on them?
calcite and dolomite
muscovite mica and sulfur
fluorite and olivine
halite and talc
Answer explanation
For calcite and dolomite, "bubbles with acid" is a distinguishing characteristic listed on ESRT p. 16.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The igneous rock rhyolite consists of potassium feldspar, plagioclase feldspar, biotite, amphibole, and which other mineral?
garnet
quartz
pyroxene
olivine
Answer explanation
If you draw a line down from the center of the box for rhyolite, the line will cross all minerals listed as well as quartz.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which metamorphic rock has experienced the most intense heat and pressure?
schist
slate
gneiss
phyllite
Answer explanation
On ESRT p. 7, the downward arrow indicates INCREASING heat and pressure. Gneiss is listed at the bottom, indicating that it formed from the most intense heat and pressure.
Slate --> Phyllite --> Schist --> Gneiss
(listed in order of increasing heat/pressure)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quartz sandstone that encounters contact metamorphism would become:
schist
quartzite
phyllite
slate
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Intrusive rocks:
cool slowly and have large crystals
cool quickly and have large crystals
cool slowly and have small crystals
cool quickly and have small crystals
Answer explanation
Intrusive rocks solidify underground where the temperatures are warmer than the surface.
Because of this, intrusive rocks are able to cool slowly.
The longer the cooling time, the bigger the crystal size.
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