8
lesson pretestMultiple Choice

Pretest

Question 8 • Physical Science

Which is a compound machine?

Answer
A
a broom
B
a pair of scissors
C
a slide
D
a screwdriver

Explanation

A compound machine combines two or more simple machines. A pair of scissors combines levers, which move the handles, with wedges, which are the cutting blades. So the pair of scissors is the compound machine; a broom, slide, and screwdriver are each typically classified as a single simple machine.

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