Rocks And Minerals Notes Guide 2015 (Page 4 of 4) in pdf

Rocks And Minerals Notes Guide 2015 Page 4

D. T he m ineral’s _ ____________________________ i s i ts

resistance t o b eing s cratched. N umber _ ________ i s t he

“hardest” m ineral a nd n umber _ ______ i s t he “ softest”

mineral.

“A m ineral’s h ardness i s t ested u sing t he _ ______________

scale.”

( *The p icture t o t he l eft i llustrates h ow t o

u se a M ohs’s s cale t o t est f or a m ineral’s

h ardness.)

“How d o m inerals b reak?”

E. _ __________________________________is t he t endency

o f s ome m inerals t o b reak a long s mooth, f lat s urfaces.

F. _ ___________________________________ i s t he

t endency o f s ome m inerals t o b reak u nevenly a long c urved

a nd i rregular s hapes.

G. _ ____________________________ i s t he m easure o f h ow

much m atter i s i n a g iven a mount o f s pace. M inerals c an

either f loat o r s ink i n w ater d epending o n t heir d ensity.

4. ( Gems?/ O res?) a re r are m inerals t hat c an b e “ cut” a nd “ polished”.

5. ( Ores? C rystals?) c ontain a s ufficient a mount o f m inerals t hat c an b e e conomically e xtracted f rom t he

rock. T he o res a re e xtracted f rom t he e arth t hrough m ining f or p rofit.

Rocks And Minerals Notes Guide 2015 Page 4