beaver dams ted ed

What is the length of the world's longest beaver dam?

• 750 meters

• 1000 meters

• 850 meters

• 500 meters

What materials do beavers use to build their dams?

• Sand and gravel

• Concrete and steel

• Vegetation, mud, and sticks

• Clay and stones

How do beavers choose a location for their dam?

• By selecting a rocky and dry area

• By locating a medium-sized stream with a soft muddy bottom

• By finding a steep and deep river

• By choosing a place with no water flow

How long can beavers hold their breath underwater?

• 15 minutes

• 5 minutes

• 20 minutes

• 10 minutes

What is one benefit of beaver dams for humans?

• They cause droughts

• They make rivers disappear

• They increase air pollution

• They slow down floodwaters