GEOLOGY

EARTH SCIENCE

MINERAL PHYSICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Brick, steel, and glass all come from substances found in Earth’s crust, but they are NOT called minerals because they are
A
not made by nature
B
made of rock.
C
too hard and heavy
D
useful to humans.
Explanation: 

Detailed explanation-1: -Cement, brick, steel, and glass all come from substances found in Earth’s crust. However, these building materials are manufactured by people. Because they are not naturally occurring, such materials are not considered to be minerals. Inorganic A mineral must also be inorganic.

Detailed explanation-2: -Although brick, steel, and glass all come from substances found in Earth’s crust, they are not classified as minerals. Why are they NOT classified as minerals? They are not classified as minerals because they are organic.

Detailed explanation-3: -Glass-can be naturally formed (volcanic glass called obsidian), is a solid, its chemical composition, however, is not always the same, and it does not have a crystalline structure. Thus, glass is not a mineral.

Detailed explanation-4: -Sometimes a rock may contain organic remains in it. A mineral, on the other hand, will never have any organic material present within it. Rocks do not have a definite shape whereas minerals will usually have one. Rocks are classified as igneous, metamorphic and sedimentary.

Detailed explanation-5: -Are bricks rocks or minerals? It’s a “flakey” mineral that’s formed when mud or clay condenses and is a common material used in a variety of other building components like cement. Shale and Kaolin are ground together to make the basic body of the brick.

There is 1 question to complete.