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7th Grade, Unit 2- Minerals
Test Description: Unit 2
Instructions: Answer all questions to get your test result.
1) A mineral is a substance that forms
A
from nature
B
from one element
C
in liquid
D
from rocks
2) A crystal structure is characteristic of
A
magma
B
an element
C
a rock
D
a mineral
3) A mineral is made up of one or more
A
elements
B
ores
C
rocks
D
compounds
4) How is it possible for two different minerals to have the same chemical composition?
A
One is formed only by organisms
B
Only one is a rock-forming mineral
C
They have different appearances
D
They have different crystal structures
5) Most minerals in Earth’s crust belong to the silicate mineral group because this group contains the:
A
most valuable metals on Earth
B
most common elements on Earth
C
rarest elements on Earth
D
largest crystals on Earth
6) Which of the following is the least reliable clue to a mineral’s identity?
A
color
B
density
C
luster
D
hardness
7) Many properties of a mineral are related to the
A
speed at which it formed
B
number of elements of which it is made
C
other types of minerals present as it formed
D
strength of bonds between its atoms
8) What types of minerals form in an area depends in part on
A
the density of rocks present
B
the types of rocks present
C
which elements are present
D
whether crystals can form
9) Open-pit mining is used to obtain ores that lie
A
near the surface of the Earth
B
in riverbeds
C
deep in the Earth’s crust
D
under flat land
10) Gemstones are used in
A
building materials
B
paper products
C
jewelry making
D
automobile parts
11) Each mineral has its own type of __________ structure
A
crystal
B
cleavage
C
luster
D
fracture
12) Cleavage is the tendency of crystals to break along flat surfaces, ___________ means crystals break in irregular patterns
A
crystal structure
B
streak
C
fracture
D
luster
13) Magma is molten rock found inside of earth, __________ is magma that has reached the surface of earth
A
volcanic eruption
B
metamorphic rock
C
lava
D
cool magma
14) The amount of mass in a given volume of a specific substance is its
A
density
B
weight
C
atoms
D
element
15) rocks that contain enough mineral to be profitable for mining are called
A
ores
B
diamond
C
rare elements
D
crystals
16) what property is more useful than color for identifying minerals?
A
streak
B
density
C
luster
D
hardness
17) How do you know if a mineral belongs to the carbonate group ?
A
the crystals are large
B
it bubbles in the presence of an acid
C
the hardness ranges from 2 to 3
D
it is light in color
18) If the bonds between atoms in a mineral are strong, the mineral will display fracture because there is no easy place to break
A
true
B
false
*select an answer for all questions
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