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100

The Nile River is located on which continent?

Africa

100

When a dam is built, what happens?

a reservoir

100

Samuel Langhorne Clemens (Mark Twain) wrote about these people

river pilots along the Mississippi River

100

Boats traveling on the Congo River switch their cargo to railroad cars to help avoid this type of danger?

rapids

100

a stream or smaller river that flows into a larger river

tributary

200

What could you see from a boat on the Nile River?

Ancient Pyramids

200

An unsusual feature of the Ganges River is that 

it is considered holy by Hindu people

200

Special dangers in navigating the Ob River, which empties into Artic Ocean, are

freezing temperatures and ice

200

The Yukon River played a big part in this era of history

the search for gold in the Klondike

200

a society or group of people with similar religious beliefs, customs, language, and form of government

civilization 

300

The Yellow River takes its name from the 

silt that flows in the river

300

The Murray and Darling Rivers combine to form a 

drainage basin

300

You might hear a warning about piranhas if you were taking a boat tour of this river in South America

the Amazon River

300

The Rhine River and the Danuabe River share which feature?

They both have their source in the central part of Europe

300

a buildup of sand formed by the movement of flowing water

sandbar

400

A key feature that the Nile River and the Yellow River share is that they

provide irrigation to surrounding fields.

400

For the Murray River, a small trickle of water near Mount Kosciuszko, high in the Australian mountains, is the location of the river's

source

400

The Amazon River flows through which type of surrounding environment?

a lush rainforest

400

The River Niger was key to the growth of the 

city of Timbuktu in Africa

400

the place where a river empties into a sea or other large body of water

mouth

500

On this river, people have built a great dam, in part because of the river's long history of flooding

the Yangtze River

500

Being a river pilot on the Mississippi River is especially difficult because

the river changes all the time.

500

A visitor to the Mackenzie River in the Northern Hemisphere might see which type of wildlife?

Migrating birds

500

watering of crops by moving water from a well, river, or a lake to a place where it does not rain enough to grow crops

irrigation

500

land created by silt deposits at the mouth of a river

delta