8
QuizMultiple Choice

Metals

Question 8 • GA-GSE Physical Science A

Metals are used in many products because of the characteristic properties that most metals share. Which properties of the metal tungsten make it useful in the thin, glowing filaments of light bulbs?

Answer
A
Tungsten is electrically conductive, ductile, and opaque.
B
Tungsten is ductile, is malleable, and has a high luster.
C
Tungsten is ductile, has a high melting point, and is electrically conductive.
D
Tungsten has a high luster, has a high melting point, and is silver in color.

Explanation

A light-bulb filament must be drawn into a thin wire, carry electric current, and get hot enough to glow without melting. Tungsten is ductile, electrically conductive, and has a very high melting point, so it has all three useful properties in choice C. Luster and color do not explain why it works as a filament.

AI-written and checked against the verified answer.

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