Understanding Rivers and Their Ecosystems

What are rivers home to?

• animals and plants

• only fish

• only birds

• only people

What kind of environment is shown at the beginning of the video where rivers are found?

• a desert

• a city

• a natural outdoor area with trees and water

• a snowy mountain

Where do many rivers start?

• high up in hills or mountains

• in the ocean

• in big cities

• in deserts

What is the beginning of a river called?

• the mouth

• the source

• the bend

• the end

Which of these can be a source of a river?

• a lake

• a bog

• rainfall

• all of the above

What is a spring?

• where water is released from under the ground

• a type of plant

• a big lake

• a type of fish

How does water from a source become a river?

• it flows uphill

• it trickles downhill and joins other streams

• it evaporates

• it stays in one place

What happens to the flow of water as a river twists and bends?

• it speeds up

• it slows down

• it stops

• it goes backward

Where do rivers usually end?

• in a mountain

• in a desert

• in the sea or a lake

• in a small pond

What is the place where a river enters the sea or a lake called?

• the river mouth

• the river source

• the river bend

• the river bank