- Did you ever think that grass could be strong enough for building a bridge? How did the Inca work with grass to make it strong enough?
- Why do you think the Inca chose grass as the material for building their bridge?
- What constraints did the Inca have in solving their design problem? (limited materials, 150-foot width to cross)
- Compare suspension bridges that you have crossed to the one made by the Inca. How are they similar? How are they different? What material is the bridge that you crossed made of and why do you think the engineers chose this material? How are engineers influenced in their bridge designs by what will have to cross the bridge?
