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True or False
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Determine whether each of the statements below is true or false.

1
Diamonds are the hardest natural mineral.
A)TRUE
B)FALSE
2
Gypsum is the softest naturally occurring substance on Earth.
A)TRUE
B)FALSE
3
Diamonds are found only in South Africa.
A)TRUE
B)FALSE
4
Minerals are composed of compounds.
A)TRUE
B)FALSE
5
All silicate minerals are composed of silicon-oxygen tetrahedra arranged in various ways.
A)TRUE
B)FALSE
6
By definition, water is a mineral.
A)TRUE
B)FALSE
7
By definition, petroleum is a mineral.
A)TRUE
B)FALSE
8
By definition, coal is mineral.
A)TRUE
B)FALSE
9
Diamonds are formed by carbon subjected to very high pressure deep inside the Earth.
A)TRUE
B)FALSE
10
Atoms may gain or lose neutrons.
A)TRUE
B)FALSE
11
Atoms may gain or lose electrons.
A)TRUE
B)FALSE
12
Eight elements comprise 98.5% of Earth's crust.
A)TRUE
B)FALSE
13
The most abundant element in Earth's crust is carbon.
A)TRUE
B)FALSE
14
The most abundant element in Earth's crust is oxygen.
A)TRUE
B)FALSE
15
The most abundant element in Earth's crust is hydrogen.
A)TRUE
B)FALSE
16
All compounds have a crystalline structure.
A)TRUE
B)FALSE
17
Common table salt is known to geologists as the mineral, halite.
A)TRUE
B)FALSE
18
Some minerals can be scratched with your fingernail.
A)TRUE
B)FALSE
19
All minerals display a physical property known as hardness.
A)TRUE
B)FALSE
20
All minerals display a physical property known as fracture.
A)TRUE
B)FALSE





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