1. Bridges 6 th Grade WWG Science Project

2. Objective: Design, build and test the load bearing capacity of a scale model bridge.

3. Bridge Types Beam Trestle Suspension Arch

4. Forces at Work Normal Gravity Normal

5. Model Specifications: 30 centimeters long 5 cm wide may not extend below roadway for last 5 cm on each side of bridge.

6. Model Materials: waxed paper toothpicks white glue other materials as approved by instructor –If you want to use something, ask!

7. Timeline: MondayTuesdayWednesdayThursdayFriday Brain- storm Ideas and sketch Design Begin 1:1 Scale drawing Finish drawings and begin building Build Bridges Finish building bridges Test load bearing capacity and grade bridges

8. Grading Criteria:  Specifications within tolerances (0-10 points)  Is it the right size?  Load, mass held (0-20 points)  20 pounds = 20 points  Difficulty (0-10)  How challenging was the design  Aesthetics, how good does it look (0-10 points)  Neatness, color and quality of work.  Total (0-50 points)