10
lesson pretestMultiple Choice

Pretest

Question 10 • Physical Science

Which best explains how radiation is helpful in the plastics industry?

Answer
A
It improves the strength and durability of plastic.
B
It makes plastics easier to shape.
C
It decreases the melting point of plastic.
D
It adds a protective layer to plastic.

Explanation

Radiation can cause polymer chains in plastic to cross-link, forming stronger connections between them. This can make the plastic stronger and more durable, so the best answer is “It improves the strength and durability of plastic.”

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