Math Central
Grade 6, Chapter 6 Investigation Organizer:

Bridging the Gap

Summary: Civil engineers are people who design bridges. To test the strength of a bridge they build models. Your group's challenge is to design and test a model bridge with a 40-cm gap. Your bridge will have to support the weight of 100 pennies.

1. Plan It

Make five paper tubes that are 21-cm (8 1/2 in.) long. Use 8 1/2 in. by 11 in. paper.

[Checkbox] Our planning completed

2. Put It Together

A. Put two desks close to each other.

B. Create a chart. Create a chart using the example on page 227 of your textbook, or the Calculations Chart here on Education Place. Record the longest gap before the "bridge" falls.

C. Repeat. Repeat the steps with the other tubes.

[Checkbox] Our experiments completed

3. Wrap It Up

A. Discuss. Discuss your data. What have you learned from your experiment? Which design works best?

B. Design. Design a bridge that can span a 40­cm gap and support the weight of 100 pennies.

[Checkbox] Model completed

4. Discuss Your Results

[Checkbox] Review completed

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