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Question Group Info

This question group is public and is used in 38 tests.

Author: LBeth
No. Questions: 10
Created: Mar 28, 2016
Last Modified: 9 years ago

Mohs Hardness Scale

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Use the chart to answer the questions about mineral hardness.

Mohs Hardness Scale
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TalcGypsumCalciteFluoriteApatiteOrthoclaseQuartzTopazCorundumDiamond
Grade 8 Minerals
B.
Gypsum will scratch talc.
  1. True
  2. False
Grade 8 Minerals
C.
Orthoclase will scratch corundum.
  1. True
  2. False
Grade 8 Minerals
D.
Quartz will scratch calcite.
  1. True
  2. False
Grade 8 Minerals
E.
Topaz will scratch diamond.
  1. True
  2. False
Grade 8 Minerals
F.
Which of these minerals is the softest based on Mohs scale?
  1. fluorite
  2. gypsum
  3. corundum
  4. orthoclase
Grade 8 Minerals
G.
Which of these minerals is hardest?
  1. topaz
  2. quartz
  3. calcite
  4. apatite
Grade 8 Minerals
H.
Which statement comparing mineral hardness is true?
  1. calcite will only scratch gypsum
  2. calcite will only scratch gypsum and talc
  3. calcite will scratch any mineral softer than 3
  4. calcite will scratch any mineral harder than 3
Grade 8 Minerals
I.
An unidentified mineral can be scratched by orthoclase, but not by calcite. Which of the following best describes the mineral's hardness?
  1. less than 3
  2. more than 7
  3. less than 7 and more than 6
  4. more than 3 and less than 6