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Exam 2: Minerals: The Building Blocks of Rocks

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Question 31

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What is the name of dark-coloured mica?

A) calcite
B) biotite
C) quartz
D) olivine

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Question 32

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Colour is one of the most diagnostic properties of minerals.

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Question 33

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An atom's atomic weight is 13 and its atomic number is 6.How many neutrons are in its nucleus?

Overall, the physical properties of minerals provide a reliable means to identify common minerals.However, certain properties can exhibit a range of characteristics or values making them less useful for identification purposes.Choose three physical properties that might vary considerably between samples of the same mineral and explain why such variability would exist.

Optically transparent calcite exhibits the special property of "double refraction."

Parallel, straight, linear imperfections visible on the cleavage surfaces of plagioclase feldspar are called what?

The eight most abundant elements in the Earth's crust by weight are: ________.

Which is the most common mineral class?

While there are 90 naturally occurring elements, these combine in various proportions and structures to make nearly ________ minerals.

Emeralds are gem quality single crystals of the more ordinary mineral ________.

Which common rock forming minerals exhibit cleavage planes at nearly 60°/120°?

What, basic, atomic particles occupy space in an atom outside of the nucleus?

Given the similar chemical compositions of the real mineral jadarite and the fictional mineral kryptonite, what is different about real kryptonite?

Which of the following best defines a mineral and a rock?

The micas, biotite and muscovite, both exhibit one direction of cleavage.

Which of the following minerals are silicates?

Trace impurities of chromium make corundum into ruby, while traces of titanium and iron make it into sapphire.

Micas like muscovite and biotite have flexible cleavage flakes that will bend, and when the strain is taken off they relax back to their original position and shape.

Garnet, a common hard metamorphic mineral used for abrasives, has an internal crystal structure most similar to which other silicate mineral?

Coal is a rock formed mostly from fine grained carbon minerals.