Clint Eastwood Forums

Other/Miscellaneous => Off-Topic Discussion => Topic started by: Gant on October 31, 2005, 01:27:54 PM

Title: Homework assignment !
Post by: Gant on October 31, 2005, 01:27:54 PM

Help... tonights homework. What are the hardest and softest materials on Earth..

I go with diamond as the hardest natural material. Stuck on whats the softest. Any ideas....

Ta.

Title: Re: Homework assignment !
Post by: Brendan on October 31, 2005, 02:34:57 PM

http://geology.com/dictionary/glossary-m.shtml (http://geology.com/dictionary/glossary-m.shtml)

Quote

Mohs Hardness Scale:
A collection of minerals ranging from very soft to very hard. Use as a comparison scale during mineral identification. From softest to hardest, the ten minerals are: talc 1, gypsum 2, calcite 3, fluorite 4, apatite 5, orthoclase 6, quartz 7, topaz 8, corundum 9, and diamond 10. Developed by Friedrich Mohs, a German mineralogist in the early 1800’s.

Yeah for school! I remembered something! And thanks to Google for helping me too. I remembered Mohs Hardness Scale I just didn't remember the order of which things went in.

Title: Re: Homework assignment !
Post by: KC on October 31, 2005, 05:25:25 PM

Mnemonic for remembering that: "The Girls Can Flirt And Other Queer Things Can Do"!  :D

(I'll never forget the mnemonic ... I just can't remember what most of it stands for!  :o )

Title: Re: Homework assignment !
Post by: Gant on November 01, 2005, 12:30:01 AM

Thanks Brendan.... This has gotta be handed in this morning so I left it a little late... ;D

I was going down the track of diamond in it's other common natural form ..Graphite, one of the softest natural forms found on Earth...

Talc it is.