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Massachusetts Comprehensive Assessment System

2015, High School Intro Physics

  Question 45: Open-Response  
A floating object moves up and down 15 times in 60 s because of ocean waves.
  1. Calculate the period of the ocean waves. Show your calculations and include units in your answer.
  1. Calculate the frequency of the ocean waves. Show your calculations and include units in your answer.
An additional wave property must be known in order to calculate the velocity of the ocean waves.
  1. In your Student Answer Booklet, identify this additional wave property and draw a wave diagram showing how the property can be measured.
  1. Describe what will happen to the object if the amplitude of the ocean waves increases and all other wave characteristics stay the same.

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 the measurable properties of waves and the relationships among them. The response correctly calculates the period and frequency of the ocean waves. The response correctly identifies an additional wave property that must be known in order to calculate the velocity of the ocean waves, and includes a diagram showing how this property can be measured. The response also clearly describes what will happen to the object if the amplitude of the ocean waves increases.
4
3 The response demonstrates a general understanding of the measurable properties of waves and the relationships among them.
2 The response demonstrates a limited understanding of the measurable properties of waves and the relationships among them.
1 The response demonstrates a minimal understanding of the measurable properties of waves and the relationships among them.
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.

High School Intro Physics

Question 12: Electromagnetism
Question 23: Motion and Forces
Question 32: Motion and Forces
Question 44: Heat and Heat Transfer
Question 45: Waves and Radiation

Return to the MCAS 2015 Student Work Directory



Last Updated: December 27, 2011
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