Physical Science

Chapter 25: New Materials Through Chemistry

Standardized Test Practice

1.
Which of the following metals is not an alloy?
A)bronze
B)steel
C)sterling silver
D)zinc
2.
Because of its light weight, many alloys used in airplane manufacture include the element _______.
A)aluminum
B)copper
C)lead
D)chromium
3.
Which of these is a property of ceramics?
A)electrical conductivity
B)malleability
C)good heat insulator
D)chemical reactivity
4.
The purpose of the impurity in the doped semiconductor is to

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A)improve the strength of the material.
B)reduce production costs.
C)increase the density of the crystal.
D)control conductivity.
5.
The doped crystal in this illustration is a(n)

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A)n-type semiconductor.
B)alloy.
C)integrated circuit.
D)p-type semiconductor.
6.
Which of the following is not a property of most plastics?
A)light weight
B)electrical conductivity
C)chemical resistance
D)waterproof
7.
The fiberglass used in manufacturing boat hulls is an example of a(n) _______
A)alloy
B)ceramic
C)polymer
D)composite
8.
Which of the following can be made by placing n-type and p-type semiconductors together?
A)integrated circuit
B)computer chip
C)transistor
D)composite
9.
Which of these elements is used to dope silicon crystals?
A)arsenic
B)iron
C)chlorine
D)copper
10.
Syntheic fibers, such as nylon, are all _______.
A)alloys
B)ceramics
C)composites
D)polymers
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