Grade 5 Unit 5: Bright Ideas
Breaker's Bridge
by Laurence Yep

 Internet Connection Activity
 Types of Bridges
Super Bridge
http://www.pbs.org/wgbh/nova/bridge

1. Click Build A Bridge.

2. Survey the four sites.

3. Click and read about these bridges: Arch, Beam, Suspension, and Cable-stayed.

4. Play the game. Will your bridge be safe?

Bridge Facts
http://www.pbs.org/wgbh/buildingbig/bridge/basics.html

1. Obtain a blank piece of paper. Fold it in half and then fold in half again. Unfold it; you should have four small rectangles. In the upper-left rectangle, write "Beam Bridge" at the top center. Label the upper-right rectangle "Truss Bridge," the lower-left rectangle "Arch Bridge," and the lower-right rectangle "Suspension Bridge."

3. Draw a small example of each bridge in the matching rectangle on your paper. Follow the drawing with three facts about each bridge.

 Internet Connection Activity
 Bridges
Basics of Bridges
http://www.brantacan.co.uk/bridgedefs.htm

1. Select a bridge to research from the horizontal navigation bar at the top of the page. Click on that bridge’s link. Read the information given.

2. On a piece of paper, list three identifying features of the selected bridge. Then list one advantage and one disadvantage of this bridge’s design.

3. At the bottom of the page, draw a diagram of the selected bridge.

2. Name the five remaining bridges. Beside the name of each bridge, write the date the bridge was built. What is the average age of the five bridges?

3. Using complete sentences, write answers to the following questions: Do engineers currently build more covered or open-air bridges? Are covered bridges more expensive or less expensive to build than open-air bridges?

 Internet Connection Activity
 Famous Bridges
The Tacoma Narrows Bridge Disaster
http://www.fen.bris.ac.uk/engmaths/research/nonlinear/tacoma/tacoma.html

1. Read the fourth paragraph on the page for a brief introduction to the Tacoma Narrows Bridge disaster.

2. Scroll down the page to view the photos.

3. Read each caption and click on the photos to enlarge them.

4. If your computer is capable, watch either version of the video of the collapse.

The Golden Gate Bridge
http://www.pbs.org/wgbh/buildingbig/wonder/structure/golden_gate.html

1. Explore the information provided about the Golden Gate Bridge. Continue to read the paragraphs for more information about the famous bridge. Click on any hypertext word for a definition.

2. Using the information from the website, prove or disprove the following statements.

• The Golden Gate Bridge was constructed over a two year time span.
• The south tower of the bridge is built on bedrock which sits 20 feet below the water.
• The Golden Gate Bridge had to withstand an earthquake.
• Straus spent one million dollars over budget while building the bridge.
• The Golden Gate Bridge is over 8,000 feet long.