Chapter 4 Test – Minerals (2004)
Indicate True (A) or False
(B) for each of the questions below.
1.
Color is one of the most
useful properties for mineral identification.
2.
Most rock-forming
minerals are silicate minerals.
3.
A mineral will scratch
any other mineral that has a lower number on Mohs’ scale of hardness
Select the BEST answer for
each question.
4.
Calcite, feldspar, mica,
and quartz are all classified as
A.
carbonate minerals. C.
rock-forming minerals.
B.
rare minerals. D.
silicate minerals.
5.
Which of the following
is NOT a reason why color is little used for some minerals?
A.
Air can change the color
of some minerals.
B.
Impurities can change
the color of minerals.
C.
All minerals change
color with time.
D.
Different minerals may
have similar colors.
6.
To identify a mineral
specimen in transparent sealed case, which of the physical properties can you
NOT use?
A.
color C.
hardness
B.
crystal shape D. luster
7.
Observing the reaction
of hydrochloric acid with a mineral is a method of testing for
A.
calcite. C.
mica.
B.
metals. D.
orthoclase feldspar.
8.
If a specimen has a
vitreous luster it will look like
A.
a pearl. C. polished metal.
B.
shining glass. D. wax.
9.
The number of currently
known minerals is
A.
under 1500. C.
over 2000.
B.
over 4000. D.
under 500.
10. A mineral sample is harder than calcite but softer
than fluorite. What would its hardness
be?
A.
3 C. 3.5
B.
4 D. 4.5
11. The fracture of a mineral refers to
A.
whether the refraction
is single or double.
B.
how easily broken it is.
C.
the number and direction
of its cleavages.
D.
its tendency to separate
along other than cleavage planes.
12. The carbonate mineral which splits light rays in such
away that a double image forms is
A.
dolomite. C.
azurite.
B.
siderite. D.
Iceland spar.
13. Which of the following minerals sometimes shows double
refraction?
A.
halite C.
quartz
B.
calcite D.
muscovite
14. What test or property would be most useful in
determining whether a mineral specimen was gold or pyrite?
A.
color C. magnetism
B.
hardness D.
luster
Write the missing word(s)
in the space provided.
15. ______________ is the study of minerals and their
properties.
16. Common minerals that make up most of the rocks in the
earth’s crust are called ______________.
17. According to Mohs’ scale of hardness, the hardest
mineral is ____________.
18. The most easily observed property of minerals is
______________.
19. The only property needed to identify halite is
_______________.
20. The mineral with a hardness of exactly 2.5 is
_______________.
21. Calcite has _________ perfect cleavage plains.
22. The mineral with a specific density of 5.17 is
____________.
23. Name the type of luster Pyrite has:_______________.
24. Gypsum has a hardness of ___________.
25. Magnetite has a hardness of ____________.
26. What is the chemical formula for Galena: ___________.
27. What was the most dense mineral in the lab exercise
the other day? _________.
28. How much cleavage plains does Galena have?
____________.
29. Which mineral from lab has the chemical formula PbS?
___________.
30. Which of the minerals from lab are often found in the
making of pencils? __________.
Match the terms in Column
1 with the phrases in Column 2. Write
the letter of the correct phrase in the blank on the left.
Column 1 Column 2
____31. cleavage a.
The measure of how easily a mineral can be
scratched.
____32. diamond b. Name given to the scale of hardness.
____33. fracture c.
One of the softest known minerals.
____34. hardness d. The hardest known mineral.
____35. mica e. Reflection of
light from a mineral’s surface.
____36. luster a. Color left by
powdered mineral on unglazed
porcelain.
____37. Mohs b.
Tendency to break along smooth, flat
surfaces.
____38. quartz c.
A common mineral that breaks along
smooth, flat surfaces.
____39. streak d.
Tendency to break with rough or jagged
edges.
____40. talc e. A common
mineral that breaks with rough or
jagged edges.