The Moh's hardness scale
When a mineral can scratch another mineral, it means that the mineral is harder than the mineral it can scratch. Hardness is a measure of a mineral's resistance to being scratched, with the Mohs scale commonly used to rank minerals based on their hardness.
The color of a mineral in powdered form is called the mineral's Streak
The Fujita scale classifies tornadoes based on damage.
Biotite is definitely a mineral. It's in the same family as muscovite, another mineral in the mica family.
quarts
Coal is not considered a mineral because it is organic in nature, formed from the remains of plants. Unlike minerals, which are inorganic and have a crystalline structure, coal does not have a consistent chemical composition or crystal structure. This distinction classifies coal as a sedimentary rock rather than a mineral.
which area of technology best classifies an iPhone
A taxonomist is a person who classifies things into kingdoms.
Lipids
Opal is an amorphous form of silica related to quartz, a mineraloid form, not a mineral. A mineraloid is a mineral-like substance that does not demonstrate crystallinity.Now you get it?
Taxonomy.
ibook
brachiopods
Astronomers classify stars.
kingdom
It is a homogeneous mixture.
perpendicular