Compare and Contrast
Purpose: To compare and contrast arch, drawbridges, and cantilever bridges
To identify characteristics of each
Materials: Venn diagrams, pencils, books with pictures of different styles of bridges, Legos, Linking logs, measuring tape
Time: 1 - 1 1/2 hours Class Size Up to 26 working in groups of 2 or 3
Procedure: 1. Read the passages about the three (3) types of bridges in the beginning of this unit. Complete the chart below for each pair of bridges.
Likenesses Differences
Bridges (arch & cantilever)
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Bridges (cantilever & drawbridge)
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Bridges (arch & drawbridge)
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2. Complete three (3) Venn Diagrams noting the likenesses and the differences the three bridge designs. Be sure to use some of the vocabulary words in your explanations.
3. Then using Legos, then Linking Logs, build two types of bridges and complete a Venn Diagram for the two you made. Use pictures.
Conclusion:
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1. What types of bridges did you decide to make?
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2. Why did you decide to make these?
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3. What was similar about your bridges?
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4. What was different?
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5. What would you have done different it you could do it over?
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