Chapter 2 Classifying Rocks Flashcards
(20 cards)
Metamorphic rocks that have their grains arranged in parallel layers or bands are said to be ________.
Foliated
How do geologist classify rock groups?
foliated and nonfoliated
A naturally occurring, inorganic solid that has a crystal structure and a definite chemical composition.
mineral
This means that the mineral cannot form materials that were once part of a living thing.
inorganic
A mineral must be this.
inorganic
The particles of a mineral line up in a pattern that repeats over and over again. This repeating pattern of a mineral’s particles forms a solid called a ______________.
crystal
The color if a mineral’s powder.
streak
The term used to describe how light is reflected from a mineral’s surface.
luster
Formula for calculating density?
Density = mass/volume
The mass in a given space, or mass per unit volume.
density
Used to describe the hardness of minerals
Mohs hardness scale
Hardness can be determined by a ______________.
scratch test
The softest known mineral. It flakes when scratched by a fingernail.
Talc
A fingernail cannot scratch it but a copper penny can.
Calcite
A steel knife can easily scratch this.
Fluorite and Apatite
Can be scratched by window glass.
Feldspar
It can scratch steel and hard glass easily.
Quartz
Can scratch quartz.
Topaz
Can scratch topaz.
Corundum
The hardest known mineral. Can scratch all other substances.
Diamond
