SCIENCE
EARTH SCIENCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Talc
|
|
|
Apatite
|
|
|
Calcite
|
|
|
Gypsum
|
Detailed explanation-1: -Talc (1), the softest mineral on the Mohs scale has a hardness greater than gypsum (2) in the direction that is perpendicular to the cleavage.
Detailed explanation-2: -#1 – Talc, the softest mineral, used to make talcum powder and rubber lubricant. #2 – Gypsum, Alabaster, soft plastics, your finger nails, made into wall board. #2.5 – Hard plastics. #3 – Calcite, Copper penny.
Detailed explanation-3: -Gypsum is one of the softest minerals, measuring 2 on the Mohs hardness scale. It can be scratched with a fingernail.
Detailed explanation-4: -Moissanite: The Second Hardest Mineral in Nature after Diamond. The colors seen in moissanite from the Mount Carmel area of northern Israel range from dark blue to light green. photo by Aurélien Delaunay. Moissanite is the name given to naturally occurring silicon carbide and to its various crystalline polymorphs.
Detailed explanation-5: -Ten minerals make up the Mohs Scale from softest to hardest, they are talc (1), gypsum (2), calcite (3), fluorite (4), apatite (5), feldspar (6), quartz (7), topaz (8), corundum (9) and diamond (10).