Rocks and Minerals quiz Flashcards
1
Q
a naturally occurring substance formed in the earth
- inorganic
- solid substance
- definite chemical composition
A
Mineral
2
Q
what are the ways minerals form?
A
- crystallization from magma
- precipitation
- pressure and temperature
- hydrothermal solutions
3
Q
minerals form as magma cools
- faster cooling = more crystals
A
crystallization from magma
4
Q
when the water evaporates and forms minerals
A
precipitation
5
Q
added pressure can cause minerals to re-crystallize while still solid
A
pressure and temperature
6
Q
a very hot mixture of water and dissolved substances
A
hydrothermal solution
7
Q
what happens hydrothermal solutions come in contact with existing minerals?
A
chemical reactions take place
8
Q
how many minerals are known to earth?
A
over 3800
9
Q
what are the 6 major groups?
A
silicates, carbonates, oxides, sulfates/sulfides, hallides and native elements
