What are dams made of? |
 |
Beavers make their dams from earth, rock, trees, and
branches. People dams can also be made from earth or rock; these are called
embankment dams. |
People dams are also made from
concrete.
People also use concrete to make
bridges, buildings, and sidewalks. |
 |
Pushing and pulling courtesy of Dave and Tim
of the Winter Structural Lab at Cornell. |
Concrete is good when you
on it.
Concrete is not good when
you
on it.
Concrete is good for dams because the water is pushing on it. |
What types of dams are made of concrete? 
|
|
Move on to learn more
about each type of dam!
|
