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Massachusetts Comprehensive Assessment System

2012, High School Intro Physics

  Question 32: Open-Response  
When fireworks explode, they create light waves and sound waves. An investigation is performed to study the differences between the two types of waves. Three cameras capable of recording audio and video are set up at safe nearby locations in clear view of the fireworks.
  • Camera 1 is placed in an open field.
  • Camera 2 is placed in a vacuum-sealed glass container.
  • Camera 3 is placed behind sheets of polarizing glass that block electromagnetic waves.
  1. Identify whether audio only, video only, or both audio and video of the fireworks will be recorded by each camera.
  2. Explain each of your answers for part (a).
Suppose a camera records both audio and video.
  1. Will the light or the sound from the fireworks be recorded first? Explain your answer.

Scoring Guide and Sample Student Work
Select a score point in the table below to view the sample student response.

ScoreDescription
4 The response demonstrates a thorough understanding of mechanical and electromagnetic waves. The response correctly identifies and explains whether each camera records audio, visual, or both. The response also correctly explains why light will reach the camera before sound will.
4
3 The response demonstrates a general understanding of mechanical and electromagnetic waves.
2 The response demonstrates a limited understanding of mechanical and electromagnetic waves.
1 The response demonstrates a minimal understanding of mechanical and electromagnetic waves.
0 The response is incorrect or contains some correct work that is irrelevant to the skill or concept being measured.

Note: There are 2 sample student responses for Score Point 4.

None found...

Return to the MCAS 2012 Student Work Directory



Last Updated: January 6, 2013
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