Gemstone and Metal Flashcard 8

Front

What is the general term for a beautiful mineral prized for its hardness, color, and "fire"?

Back

Precious stone

Answer explanation

The statement is false because the general term for a beautiful mineral prized for its hardness, color, and 'fire' is a precious stone, not a native element.

Front

Ruby and sapphire are forms of diamond.

Back

False, Corundum

Answer explanation

Ruby and sapphire are not forms of diamond; they are varieties of corundum. Diamond is a different mineral composed of carbon, while corundum includes both ruby and sapphire, which are defined by their color and impurities.

Front

A metal mixture is called an alloy.

Back

True

Answer explanation

An alloy is indeed a metal mixture, which makes the statement true. The other options listed (Beryl, Corundum, Simulant) are not definitions of an alloy.

Front

Emerald and aquamarine are varieties of beryl.

Back

True

Answer explanation

Emerald and aquamarine are indeed varieties of beryl, which is a mineral composed of beryllium aluminum cyclosilicate. Therefore, the correct answer is True.

Front

Lab-created gemstones that have the same appearance and chemical content as natural gemstones are simulant gemstones.

Back

False, Synthetic

Answer explanation

The statement is false because lab-created gemstones that are chemically identical to natural ones are referred to as synthetic gemstones, not simulant gemstones, which are different in composition.

Front

What is the abundant metal that is the primary ingredient of steel?

Back

Iron

Answer explanation

Iron is the most abundant metal and the primary ingredient in steel, providing strength and durability. Other options like aluminum, copper, and lead are not the main components of steel.

Front

Which lightweight, silvery metal is used to make aircraft parts, automobile wheels, kitchen foil, and soft drink cans? Options: Aluminum, Copper, Iron, Lead

Back

Aluminum

Answer explanation

Aluminum is a lightweight, silvery metal known for its use in aircraft parts, automobile wheels, kitchen foil, and soft drink cans, making it the correct answer. The other options do not fit these applications.

Front

Which metal is used for radiation shielding, automobile batteries, and small-arms ammunition?

Back

Lead

Answer explanation

Lead is commonly used for radiation shielding due to its high density and atomic number, making it effective at blocking radiation. It is also used in automobile batteries and small-arms ammunition, confirming it as the correct choice.

Front

What is the reddish-orange metal often used for electrical wiring?

Back

Copper

Answer explanation

Copper is a reddish-orange metal known for its excellent electrical conductivity, making it the preferred choice for electrical wiring. Aluminum is lighter but not as conductive, while iron and lead are not typically used for wiring.

Front

Which white-gray metal is more valuable than gold?

Back

Platinum

Answer explanation

Platinum is a rare white-gray metal that is more valuable than gold due to its scarcity and demand in various industries, including jewelry and automotive. In contrast, aluminum, copper, and silver are less valuable.