WorksheetsMinerals and Silicates Quiz
Total questions: 8
Worksheet time: 4mins
Name
Class
Date
1.
Which subclass of silicates is divided into two subgroups: pyroxenes and amphiboles?
a)
Cyclosilicates
b)
Chain silicates
2.
What is the general formula for pyroxenes?
a)
AB2C5(Si,Al)8O22W2
b)
XY(Si,Al)2O6
3.
Which pyroxene is the most abundant?
a)
Augite
b)
Hornblende
4.
What is the general formula for amphiboles?
a)
AB2C5(Si,Al)8O22W2
b)
XY(Si,Al)2O6
5.
Which group of sheet silicates is held together by van der Waals forces?
a)
Clay minerals
b)
Chlorite group
6.
What is the basic chemical formula for feldspars?
a)
(Ca,Na,K)(Si,Al)4O8
b)
AB2C5(Si,Al)8O22W2
7.
Which mineral is composed entirely of silica tetrahedra?
a)
Anorthite
b)
Quartz
8.
Which polymorph of SiO2 can only be formed at pressures greater than 10 gigapascals?
a)
Stishovite
b)
Coesite
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