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Eighth Grade (Grade 8) Minerals Questions

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Grade 8 Minerals
Which is the way a mineral breaks apart in an irregular way?
  1. Mineral
  2. Cleavage
  3. Crystal
  4. Fracture
Grade 8 Minerals
Quartz, feldspar, and Mica are silicate minerals. Silicate minerals contain atoms of silicon and oxygen and often other elements bonded together. Which of the following is TRUE about silicate minerals?
  1. They are pure elements.
  2. They are made up of compounds.
  3. They melt at very low temperatures.
  4. They are made up of only one kind of atom.
Grade 8 Minerals
The mineral galena tends to break into perfect cubes. Which mineral property does this describe?
  1. fracture
  2. cleavage
  3. crystal habit
  4. specific gravity
Grade 8 Minerals
Minerals that glow under ultraviolet light have a property known as
  1. magnetism.
  2. radioactive.
  3. carbon dioxide.
  4. fluorescence.
Grade 8 Minerals
What is the hardest mineral on Mohs scale?
  1. Sulfur
  2. Graphite
  3. Talc
  4. Diamond
Grade 8 Minerals
A mineral that is shiny or metallic looking is said to have this.
  1. Cleavage
  2. Fracture
  3. Streak
  4. Luster
Grade 8 Minerals
All the following are correct regarding minerals except which one?
  1. must be inorganic
  2. definite volume
  3. shape repeating pattern
  4. formed by nature in a natural process
  5. definite chemical composition
  6. all minerals are compounds
Grade 8 Minerals
What scale is used to determine the hardness of a mineral?
  1. Balance
  2. Weight
  3. Mohs
  4. Gram
Grade 8 Minerals
Which of the following properties describes a soil's ability to supply nutrients?
  1. soil structure
  2. infiltration
  3. soil fertility
  4. consistency
Grade 8 Minerals
What is silica?
  1. a mixture of silicon, water, and magma
  2. something that blocks the volcano's vent
  3. made up of sill, dikes, and volcanic necks
  4. none of the above
Grade 8 Minerals
The table shows Mohs Hardness Scale.
Mohs Scale
ValueMineral
1Talc
2Gypsum
3Calcite
4Fluorite
5Apatite
6Orthoclase
7Quartz
8Topaz
9Corundum
10Diamond

Based on the table, which statement is true?
  1. corundum will scratch diamond
  2. quartz will scratch corundum
  3. calcite will scratch orthoclase
  4. orthoclase will scratch fluorite
Grade 8 Minerals
You pick up a mineral sample in your hand. It feels heavy compared to most other mineral samples. Which statement best describes your mineral sample?
  1. It has a low specific gravity.
  2. It has a high specific gravity.
  3. It has a hardness less than 5.
  4. It has a hardness greater than 5.
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