Anything in nature that is moving likes to keep going straight ahead at a constant speed. That is a paraphrase of Isaac newton's first law of motion. So when water flowing down a river comes to a turn, the water tries to keep going straight. The water eventually yields to the direction of the riverbed but not before doing some erosion to the river bank at the outer side of the turn. As the erosion continues over thousands of years, the river develops large, S-shaped meanders. A river's age can be roughly estimated by the quantity and size of its meanders.
Meander
"bends"
Because waves ARE curved shapes!
The plural form of curve is curves.
The plural form of the singular noun stream is streams.The plural possessive form is streams'.
After a stream
steam
The plural form of the word "stream" is simply "streams."
The stream's catchment.
Tiny rills enlarge to form gullies, which join to form a stream.
steam
Well, the winds start from the west to start the current and then it will form the gulf stream