Minerals by Charlene Abreu https://padlet.com/coms18841/w3du0zc666yl By: Charlene Abreu, Summer Kirk, and Sydney Soebroto en-us 2020-03-31 20:43:52 UTC 2024-06-08 03:38:13 UTC hello@padlet.com Color coms18841 https://padlet.com/coms18841/w3du0zc666yl/wish/485499796 a visual attribute of an object based on perception.
  • one of the most obvious, but not the most reliable 
  • many of the 4000 known minerals share similar colors
]]> 2020-03-31 22:13:41 UTC https://padlet.com/coms18841/w3du0zc666yl/wish/485499796 Streak coms18841 https://padlet.com/coms18841/w3du0zc666yl/wish/485507847 the color of a finely-crushed powder when a mineral is dragged across a streak plate. 
  • weathering changes the outside color, but streak gives the true color.
]]> 2020-03-31 22:22:47 UTC https://padlet.com/coms18841/w3du0zc666yl/wish/485507847 Luster coms18841 https://padlet.com/coms18841/w3du0zc666yl/wish/485510228 the shine of an unweathered mineral; the way it looks reflected in light.
Two Types of Luster
  • metallic luster: shines like stainless steel (metal)
  • nonmetallic luster: earthy or dull shine
]]> 2020-03-31 22:25:29 UTC https://padlet.com/coms18841/w3du0zc666yl/wish/485510228 Density coms18841 https://padlet.com/coms18841/w3du0zc666yl/wish/485510319  The ratio of mass and volume of an object. 
formula- D=M/V
work- D=350 G/35 ML
answer- D=10 G/ML]]> 2020-03-31 22:25:37 UTC https://padlet.com/coms18841/w3du0zc666yl/wish/485510319 Hardness coms18841 https://padlet.com/coms18841/w3du0zc666yl/wish/485510692 resistance of a mineral to being scratched
  • MOHS Hardness Scale is used to classify hardness 
]]> 2020-03-31 22:25:56 UTC https://padlet.com/coms18841/w3du0zc666yl/wish/485510692 Cleavage coms18841 https://padlet.com/coms18841/w3du0zc666yl/wish/485511277 the tendency of a mineral to break along weak areas and form semi-smooth or parallel surfaces. 
-can break in one direction or 3 directions (90 angles)]]> 2020-03-31 22:26:37 UTC https://padlet.com/coms18841/w3du0zc666yl/wish/485511277 Fracture coms18841 https://padlet.com/coms18841/w3du0zc666yl/wish/485511459 an irregular or uneven break 
  • tends to lack preferred zones of weakness 
for example: fibrous; conchoidal
]]> 2020-03-31 22:26:45 UTC https://padlet.com/coms18841/w3du0zc666yl/wish/485511459 Acid Test coms18841 https://padlet.com/coms18841/w3du0zc666yl/wish/485511538 a test showing when dilute acid (HLC) is placed on a mineral, it may bubble
  • calcite and dolomite both react with acid
]]> 2020-03-31 22:26:51 UTC https://padlet.com/coms18841/w3du0zc666yl/wish/485511538