
Building Bridges
1st Grade · Science · 30 min
Lesson Preview
Learning Objective
I can build a bridge that can hold toy cars.
- 1
Engineers design bridges to help roads or railroads cross things like a river or valley.
- 2
Triangles are strong shapes that engineers use to build bridges because they don't bend easily when force is applied.
- 3
Suspension bridges use thick cables and tall towers to spread out the weight and hold up the bridge.


