Psst...Hey, You by Mark Fischetti

Part A: In paragraph 2, what does the word "exude" mean?

• to project

• to disguise

• to assist

• to calculate

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Part B: Which statement from paragraph 2 supports the answer to Part A?

• "standing in a cylinder of sound"

• "which humans cannot hear"

• "emit audible tones as they interact with air"

• "describing these interactions mathematically"

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CCSS.RI.7.2

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Part A: In paragraph 2, how does the author help the reader understand how ultrasound works?

• by describing the features of new technology

• by using familiar concepts to explain new technology

• by explaining how researchers discovered new technology

• y providing additional resources about the new technology

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Part B: Which sentence from paragraph 2 best supports the answer to Part A?

• "At that moment, you are standing in a cylinder of sound."

• "Whereas a loudspeaker broadcasts sound in all directions, the way a lightbulb radiates light, a directional speaker shines a beam of waves akin to a spotlight."

• "The beam consists of ultrasound waves, which humans cannot hear, but which can emit audible tones as they interact with air."

• "By describing these interactions mathematically, engineers can coax a beam to exude voice, music or any other sound."

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CCSS.RI. 9-10.2

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Part A: What is the main purpose of including the section " Did You Know...?"

• to show how the scientist experiment with ultrasound

• to envision how ultrasound will likely be used in the future

• to explain why understanding ultrasound technology is crucial

• to include additional information gathered in the study of ultrasound

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Part B: Which statement from the section "Did You Know..." applies to Pompei's attempt to "harness the phenomenon" mentioned in paragraph 3?

• "Ultrasound waves remain in a tight column where they reflect off a hard, smooth surface."

• "Police teams could bounce a beam off a distant window inside a warehouse to flush out suspects, who would run away from the sound"

• "Dogs can hear up to 40,000 Hz or so, mice up to 90,000, and bats porpoises and beluga whales up to 100,000 Hz or higher."

• "But researchers have applied ultrasound up to 200,000 HZ to the skulls of volunteers, some of whom report "hearing sounds; the skull may be distorting vibrations that reach the cochlea.

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