Minerals Quiz

	Which of the following statements is false? Formation of table salt:
	. Correct Answer: is an example of solidification of a melt.

Question 2
	Calcite and aragonite minerals that constitute clam shells are examples of which method of mineral formation?
	Correct Answer: biomineralization

Question 3
	Silicates:
	Correct Answer:   all of the above.

Question 4
	Which of the following statements is false? Crystals:
	Correct Answer:    are formed by the high-temperature, extremely rapid process known as solid-state diffusion.

Question 5
	Which of the following is not a mineral?
	Correct Answer:   Oil, because it's a liquid, not a solid.

Question 6
	The tendency of a mineral to break and produce smooth, curving shell-shaped surfaces is termed:
	Correct Answer:   conchoidal fracture.

Question 7
	There are two physical properties of minerals that both result in smooth, flat surfaces with specific angles between them. The first property is the result of how the mineral forms; the second is the result of breaking a sample of the mineral. These properties are called:
	Correct Answer: crystal form and cleavage.

Question 8
	Graphite is:
	Correct Answer: the lead in the pencil you write with.

Question 9
	An unknown mineral scratches glass, has only average specific gravity, and shows no cleavage but does show conchoidal fracture. Which of the following could it be?
	Correct Answer: quartz

Question 10
	Which of the following statements is false? Diamonds:
	Correct Answer:   are found in carrot-shaped structures called pegmatites.

Question 11
	The expression "24 karat" must mean that:
	Correct Answer:   the substance is 100% pure.

Question 12
	When you scrape a mineral along a ceramic plate to observe the color of its powder, you are checking the physical property known as:
	Correct Answer: streak.

Question 13
	An unknown mineral sample can be scratched by a copper penny and will scratch the penny. It reacts with dilute hydrochloric acid to produce carbon dioxide gas. Which of the following could it be?
	Correct Answer:  calcite

Question 14
	Which of the following groups of silicate minerals exhibits a single strong cleavage in one direction?
	Correct Answer:  sheet silicates

Question 15
	Glass is not a mineral because it doesn't have crystal lattice structure.
	Correct Answer:  True

Question 16
	A geode is filled with anhedral crystals on its walls.
	Correct Answer:  False

Question 17
	Calcite and halite both have one direction of cleavage.
	Correct Answer:  False

Question 18
	Mica peels apart in parallel sheets because the chemical bonds between sheets are weak and the chemical bonds within sheets are strong.
	Correct Answer:  True

Question 19
	The energy of various crystals has been shown to “channel the life force” and positively affect humans.
	Correct Answer:  False

Question 20
	Ice crystals form by solidification of a melt.
	Correct Answer:  True

Question 21
	Minerals can be destroyed by heating them, by dissolving them, by some chemical reactions, or by microbial action.
	Correct Answer:  True

Question 22
	Pegmatites are rocks composed of extremely fine-grained mineral crystals so it's easy to see the gemstones in them.
	Correct Answer:  False

Question 23
	Color and cleavage are two very useful physical properties used to identify quartz.
	Correct Answer:  False

Question 24
	Gold and copper can both be found as native metals.
	Correct Answer:  True

Question 25
	Facets are simply a jeweler's encouragement of crystal faces.
	Correct Answer:  False

Question 26
	The Hope Diamond, now in the Smithsonian Institution in Washington, D.C., has exceptional value because in addition to being the subject of legends and curses, it's a rare blue diamond.
	Correct Answer:  True

Question 27
	Examples of precious stones are diamonds, rubies, sapphires, and emeralds; examples of semi-precious stones are aquamarines, garnets, topaz, and tourmaline.
	Correct Answer:  True

Question 28
	All precious and semi-precious stones must be transparent.
	Correct Answer:  False

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