Mineral knowledge
natural, nonliving solid crystal that makes up rocks
mineral
the test of a mineral that determines the resistance of a mineral to being scratched.
Hardness
the color of a mineral in powdered form
streak
chart that compares the hardness of common materials to the hardness of minerals
Mohs hardness scale
How are rocks like chocolate chip cookies
Rocks on the other hand are made of several minerals and are more like chocolate chip cookies. They have several ingredients and the eggs, butter, sugar and chocolate chips would be like minerals
This test looks at if a mineral is metallic or nonmetallic ( dull/shiny)
Luster
a solid material made up of molecules that are arranged in repeating patterns
crystals
Would a gypsum which is a two scratch topaz that's an 8 ?
No - harder scratches softer
T/ F Minerals and Rocks are the same time
False - Rocks are a mixture of all different materials where minerals are all all pure substance
Test that looks at how a rock would break
Cleavage
the way that light reflects from the surface of a mineral
luster
True or False -- same hardness minerals can scratch each other
False - they would each leave no markings on the other
What are 5 ways to identify a mineral
Color, Streak, Cleavage , hardness , luster
Least reliable test
Color
A resistance to being scratched
Hardness
Describe the order of how you would test for hardness
Take unknown mineral, start with the softer known minerals and see if you can scratch with mineral. Continue until the unknown mineral becomes scratched.
What are the characteristics of a mineral that makes them minerals
They are solids ( never liquid or gases)
Definite chemical composition + atomic structure
Inorganic – not from anything living
Naturally occurring – formed of the Earth, not man -made
Why is color sometimes inaccurate?
Color of a mineral can be deceiving because the same mineral can be several different colors AND many minerals are the same color
the splitting of rocks or crystals that repeat. (When a mineral breaks the same way!)
cleavage
Which one of these items is softest
1. Iron nail
2. fingernail
3, scratch plate
Fingernail