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7th-8th Ch. 14 Review 2
Test Description: Chapter 14 Minerals and Ores Review 2
Instructions: Answer all questions to get your test result.
1) A black mineral sample attracts iron filing. You could conclude that the mineral is ______.
A
smoky quartz.
B
tourmaline.
C
magnetite.
D
feldspar.
2) The best metallic conductor of electricity is _____.
A
copper.
B
chromium.
C
silver.
D
iron.
3) A transparent mineral fluoresces red and exhibits double refraction. You could conclude that the mineral is _______.
A
diamond.
B
calcite.
C
mica.
D
quartz.
4) Obsidian, a mineral of volcanic origin, breaks in smooth, curved surfaces. What type of fracture does it show?
A
conchoidal
B
uneven
C
fibrous
D
hackly
5) Which of the following minerals has perfect cleavage?
A
quarz
B
pyrite
C
magnetite
D
mica
6) A green mineral fizzes when a drop of dilute hydrochloric acid is placed on it. You could conclude that the mineral is ____.
A
malachite (a copper carbonate).
B
gypsum (a calcium sulfate).
C
chrysocolla (a copper silicate).
D
cuprite (a copper oxide).
7) Fool's gold (also called pyrite), which is a mineral of iron and sulfur, is classified as a/an ______.
A
carbonate.
B
oxide.
C
silicate.
D
sulfide.
8) Which of the following is not a native mineral?
A
copper
B
sulfur
C
platinum
D
quarz
9) Lodestone is the same as _________.
A
magnetite .
B
talc.
C
diamond.
D
quartz.
10) This mineral has a hardness of 1.
A
quartz
B
talc
C
magnetite
D
diamond
11) This is the hardest natural mineral.
A
diamond
B
talc
C
magnetite
D
quartz
12) This mineral can be pink, black, white, transparent, violet, blue, or green in color.
A
diamond
B
magnetite
C
quartz
D
talc
13) This is the only precious metal that readily tarnishes.
A
obsidian
B
asbestos
C
halite
D
silver
14) This has a silky luster.
A
asbestos
B
obsidian
C
halite
D
silver
15) This is the bending of light.
A
fracture
B
florescence
C
refraction
D
luster
16) This is determined by the way light is reflected.
A
florescence
B
fracture
C
luster
D
refraction
17) Glows only when illuminated by ultraviolet light
A
fracture
B
luster
C
refraction
D
florescence
18) Which of the following is a mixture?
A
diamond
B
sand (silicon dioxide)
C
seawater
D
copper
19) The country that produces more diamonds than any other is ____________.
A
The United States
B
Russia
C
Australia
D
South Korea
20) If a mineral produces flat surfaces when it breaks, then it exhibits ___________.
A
streak.
B
cleavage.
C
hardness.
D
density.
*select an answer for all questions
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