What was the challenge of this project?, To build a bridge using different materials, To build a plant using different materials, To build a robot using different materials, To build a toy using different materials, What kinds of forces act on bridges?, gravity and space forces, heavy and light forces, mind and body forces, compression and tension forces., What are bridges used for?, to play in different places at the same time, to eat with my family, to move from one place to another, to collect toys and clothes, To build a higher bridge, you need a ______________ base., narrower, wider, heavier, lighter, What kind of bridge uses a hydraulic system to move up and down?, truss, bascule, beam, arch, What type of bridge hangs below using large suspension cables?, , , , .

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