the _____ of a river is were it starts in the mountains.
source
the _____ of a river is is route from the beginning to the end.
course
Along the course, other ______ join the river.
tributaries
The ____ ______ is at the beginning. There isn´t much ______ in the river here.
upper course, water
The ____ course is in the centre. If the land is flat, it forms a loop called the ______.
middle, meander
The ______ course is at the end. The water moves _____ and deposits the _____ and stones into the sea, lake, or other river.
lower
At the lower course, the water moves ______.
slowly
At the lower course, the water deposits the ____ and _____ into the sea, lake, or other river.
sand and stones
The characteristics of a river depend on which two factors?
relief and climate
Relief means that rivers are ______ when the mountains (where their source is) are further from the sea.
longer
Rivers have more ____ when there is more _____.
water, rainfall
the ______ is the distance between the source and the mouth of the river.
length
The _____ is the amount of water passing through the river at a specific place and time.
discharge
a _____ is a variation of ____ throughout the year.
regime, discharge
