Cornell Class Notes:
Bridges- from
vines to steel
Topic: Bridges
Name: ____________________________________________________
Date: ____________________________________________________
Period: ___________________________
Questions/Main Ideas
What do you think a bridge is
used for?
Page 450
What three materials were the
first bridges made from?
Notes: Bridges Pages 450 - 457
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
________________________, __________________________, and
_______________________________ formed the first bridges.
Page 450
What is the purpose of a
bridge?
Bridges provide easy ways of getting over difficult _______________. For
thousands of years, bridges have also served as ______________________,
________________________, and homes for shops and churches.
Page 451
What keeps the bridge from
falling down?
Page 451Balanced ForcesBeam Bridges
(paragraph two)
_________________________ forces!
The weight of the bridge and the traffic on it are called the _________
which forces the beam to curve downward. ___________ force stretch the
bottom beam and __________________ forces are applied at the top of the
beam.
Page 451
What are the two types of
bridges shown on page 451?
Page 451 Arch Bridges
(paragraph four)
_____________________________ and ____________________________
What type of force is applied to an arch bridge? ____________________
Arch bridges are typically made from _________________.
Page 451
Who perfected the arch
bridge?
Page 452 Modern Bridges
The __________________!!!
By the 1800s, the United States began building bridges out of
_________________ instead of stone or wood and by the late 1800s they
began to use ______________.
Page 452 Suspension Bridges
Suspension bridges are modern versions of ___________, _____________,
________________ bridges found in tropical regions.
Page 452
What keeps the suspension
bridge from collapsing?
The weight of the bridge and the load on it act to __________ apart or
____________ the cables. This pulling apart creates ___________ forces.
What is the name of the
suspension bridge found on
pages 452 and 453?
The _______________________ ____________ bridge can be found in
San Francisco, California.
Page 454 Brooklyn Bridge
The Brooklyn Bridge is a _________________ bridge. The construction
took _______ years to complete and coast nearly ___________ lives.
Page 456 Truss Bridges
Truss bridges became popular when railroad traffic increased in the late
1800s. They are designed with thin _____________ and ______________
supports to add _______________, truss bridges were actually reinforced
________________________ structures.
Use the picture on page 456:
Name the 3 types of angles
and the 2 types of lines used
in truss bridges.
Name the four types of
bridges found on pages 451456.
Angles: __________________, _________________, _________________
Lines: ___________________________, __________________________
1. _____________________________________
2. _____________________________________
3. _____________________________________
4. _____________________________________
Draw the arch bridge on page
451 and label the forces.
Be sure to color your bridge
for full credit.