........... grow on the surface of river water.
Duckweeds
Rivers are one of the .............
natural resources.
When a river clears soil and rocks, this makes a .......
valley.
Rivers also help .........
plants.
Rivers can be wide or .......
narrow.
When ............. grow up, they fly away from rivers.
mosquitoes
As one stream flows down, other streams join it to form a .........
river.
The longest river in the world is ...........
the Nile.
.............. covers the Amazon.
The Amazon Rainforest
We can ......... water from rivers.
drink
People built cities around .......
rivers.
Fast flowing rivers form ................
gorges and canyons
Gorges and canyons are ...............
deep valleys.
......... small rivers join the Amazon.
15.000
......... and ......... form streams that flow downwards from mountains.
Rainwater / melting snow
Rivers start from ...........
mountains.
Rivers can be short or ......
long.
......... also live in rivers.
Animals
Dangerous ......... and bull sharks live in the Amazon River.
piranhas
The largest river in the world is .........
The Amazon.
We produce electricity from ....... on rivers.
dams