Minerals
Practice Test
1.
Which is not a characteristic of a mineral?
a.
naturally occurring
b.
organic solid
c.
definite crystal structure
d.
specific chemical composition
2.
What is the correct atomic composition of quartz?
a.
four atoms of silica and oxygen each
b.
two oxygen atoms and one silica atom
c.
two silica atoms
d.
two silica atoms and one iron atom
3.
A mineral is __________ if it can be mined for profit.
a.
a rock
b.
an igneous rock
c.
an ore
d.
a crystal
4.
What are the common minerals called?
a.
abundant minerals
b.
crystal minerals
c.
igneous minerals
d.
rock-forming minerals
5.
What is the hardness of quartz?
a.
7
b.
2
c.
4
d.
9
6.
What is the numerical value for the hardest mineral on the Mohs hardness scale?
a.
11
b.
20
c.
100
d.
10
7.
What makes a mineral a gem?
a.
its pearly luster
b.
its association with native elements
c.
its rarity and beauty
d.
its deep color
8.
Which crystal shown in the figure is hexagonal?
a.
3
b.
1
c.
none are hexagonal
d.
2
9.
What is the molten material under Earth's crust called?
a.
magma
b.
solution
c.
basalt
d.
minerals
10.
__________ is the way a mineral reflects light.
a.
Streak
b.
Luster
c.
Cleavage
d.
Color
