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Eighth Grade (Grade 8) Minerals Questions

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Grade 8 Minerals
Glass has a hardness of 5.5
Mohs Scale
ValueMineral
1Talc
2Gypsum
3Calcite
4Fluorite
5Apatite
6Orthoclase
7Quartz
8Topaz
9Corundum
10Diamond

Based on the table, which statement is true about the hardness of glass?
  1. Glass will scratch orthoclase but not apatite.
  2. Glass will scratch apatite but not orthoclase.
  3. Glass will scratch both apatite and orthoclase.
  4. Glass will scratch neither apatite and orthoclase.
Grade 8 Minerals

This question is a part of a group with common instructions. View group »

Talc is the softest mineral on Mohs Hardness Scale.
  1. True
  2. False
Grade 8 Minerals
Many Southern Florida beaches have offshore coral reefs. The reefs are made of
  1. loess.
  2. calcite, the same mineral in limestone.
  3. rocks eroded from the ocean floor.
  4. many different sea shells.
Grade 8 Minerals
Diamond is composed of carbon.
  1. True
  2. False
Grade 8 Minerals
This is a solid with a regularly repeating atomic structure.
  1. Rock
  2. Mineral
  3. Crystal
  4. Sediment
Grade 8 Minerals
Talc is the softest mineral on Earth.
  1. True
  2. False
Grade 8 Minerals
Some minerals can be identified by special properties. All the following are correct examples of special properties except which one?
  1. Magnetism occurs in magnetite.
  2. Uraninite is radioactive.
  3. Calcite gives off carbon dioxide when vinegar is placed on it.
  4. Quartz tastes salty.
Grade 8 Minerals

This question is a part of a group with common instructions. View group »

Which of these minerals is hardest?
  1. topaz
  2. quartz
  3. calcite
  4. apatite
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