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Massachusetts Comprehensive Assessment System

2015, Grade 8 Science and Technology/Engineering

  Question 21: Open-Response  
The picture below shows a concrete bridge over a mountain stream in a scenic park.
Picture shows a bridge between two rock cliffs with a stream underneath the bridge.
The bridge is designed for people to use to walk from the rock cliff on one side of the stream to the rock cliff on the other side.
  1. There are three major types of bridges. Identify the type of bridge shown in the picture.
  1. Explain one reason why the type of bridge shown in the picture is appropriate for the site where it was built.
  1. Engineers calculated the maximum load the bridge can hold. Identify two factors that contribute to the load the bridge can hold.

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 major types of bridges, their appropriate uses, and the effects of loads on them. The response correctly identifies the type of bridge shown in the picture. The response also clearly explains one reason why the type of bridge is appropriate for the site where it was built and correctly identifies two factors that contribute to the maximum load that the bridge can hold.
4
3 The response demonstrates a general understanding of the major types of bridges, their appropriate uses, and the effects of loads on them.
2 The response demonstrates a limited understanding of the major types of bridges, their appropriate uses, and the effects of loads on them.
1 The response demonstrates a minimal understanding of the major types of bridges, their appropriate uses, and the effects of loads on 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.

Grade 8 Science and Technology/Engineering

Question 21: Technology/Engineering
Question 22: Earth and Space Science

Return to the MCAS 2015 Student Work Directory



Last Updated: April 6, 2015
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