Bridges (BrainPop)

Place the following types of bridges in order, from weakest to strongest: A) Suspension bridge; B) Arched bridge; C) Beam bridge

• A, B, C

• C, A, B

• C, B, A

• A, C, B

The Verrazano Narrows Bridge in New York City is a suspension bridge with a main span of 1,298 meters. What does this mean?

• The bridge is 1,298 meters from end to end.

• The distance between the bridges piers is 1,298 meters.

• The bridge is 1,298 meters high.

• Each of the bridge's two decks is 649 meters long.

In a bridge, which two forces act in direct opposition to one another?

• Compression and acceleration

• Gravity and compressions

• Gravity and tension

• Tension and compression

How do arched bridges compare to suspension bridges?

• Arched bridges have shorter spans than suspension bridges.

• Arched bridges are more expensive than suspension bridges.

• Suspension bridges can hold less weight than arched bridges.

• Suspension bridges are better-designed than arched bridges.

What can you infer about beam bridges from the information presented in the movie?

• Beam bridges are the oldest type of bridge.

• Very few beam bridges exist around the world.

• Beam bridges cannot be built over long distances.

• Beam bridges cannot be built out of wood.

Which shape would you find in a truss that supports a beam bridge?

• circle

• triangle

• hexagon

• half circle

If you applied compression to an empty cardboard box, what would you be doing?

• Strengthening the box with strips of firm material.

• Placing a heavy weight on top of the box.

• Pulling the box apart.

• Pushing the sides of the box together.

How does a suspension bridge transfer the forces at work on the deck of the bridge?

• Through a series of trusses

• Through pulleys and levers

• Through cables and towers

• By dispersing the force throughout the entire length of the deck.

Where might you find a beam bridge with only two piers? Choose the best answer.

• Crossing one of the Great Lakes

• Crossing a narrow creek

• Crossing a wide, deep river

• Crossing a wide, but shallow section of a bay.

What does Tim mean when he says that an arched bridge dissipates the forces that act on it?

• It spreads the forces out over a wide area

• It transfers all of the forces to the abutments at either end of the bridge

• It makes the forces weaker

• It concentrates all the forces at the center of each arch