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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
in liquid
B
from rocks
C
from nature
D
from one element
2) A crystal structure is characteristic of
A
a rock
B
an element
C
a mineral
D
magma
3) A mineral is made up of one or more
A
compounds
B
rocks
C
elements
D
ores
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
largest crystals on Earth
B
most common elements on Earth
C
most valuable metals on Earth
D
rarest elements on Earth
6) Which of the following is the least reliable clue to a mineral’s identity?
A
hardness
B
color
C
density
D
luster
7) Many properties of a mineral are related to the
A
speed at which it formed
B
other types of minerals present as it formed
C
number of elements of which it is made
D
strength of bonds between its atoms
8) What types of minerals form in an area depends in part on
A
which elements are present
B
the types of rocks present
C
whether crystals can form
D
the density of rocks present
9) Open-pit mining is used to obtain ores that lie
A
in riverbeds
B
deep in the Earth’s crust
C
near the surface of the Earth
D
under flat land
10) Gemstones are used in
A
building materials
B
paper products
C
automobile parts
D
jewelry making
11) Each mineral has its own type of __________ structure
A
fracture
B
luster
C
crystal
D
cleavage
12) Cleavage is the tendency of crystals to break along flat surfaces, ___________ means crystals break in irregular patterns
A
luster
B
fracture
C
crystal structure
D
streak
13) Magma is molten rock found inside of earth, __________ is magma that has reached the surface of earth
A
cool magma
B
volcanic eruption
C
lava
D
metamorphic rock
14) The amount of mass in a given volume of a specific substance is its
A
density
B
element
C
atoms
D
weight
15) rocks that contain enough mineral to be profitable for mining are called
A
crystals
B
diamond
C
rare elements
D
ores
16) what property is more useful than color for identifying minerals?
A
hardness
B
streak
C
luster
D
density
17) How do you know if a mineral belongs to the carbonate group ?
A
it is light in color
B
it bubbles in the presence of an acid
C
the hardness ranges from 2 to 3
D
the crystals are large
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
false
B
true
*select an answer for all questions
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