A
Where do most rivers start?
Mountains
True or False: Rivers can create canyons by cutting through rock.
True
True or False: All river animals live in the same part of the river.
False
Where do rivers usually end?
Ocean/ Sea
Where do rivers form mudflats and deltas?
a) At the source
b) In the hills
c) Near the mouth
c) Near the mouth
In hot regions, some rivers ______ before they reach the ocean.
dry up
The river starts to drop sediment in a process called ________.
deposition
Name one use of rivers for people.
Drinking water / Farming / Transport / Energy / Industry
Which river stage has an estuary?
a) Upper course
b) Lower course
c) Middle course
B. Lower course
What causes rivers to meander?
a) Wind
b) Bends in the land
c) Water flowing faster on the outside of bends
C
Some rivers are _____ in winter.
frozen
What do we call a loop in a river?
Meander
What forms when a river flows into the sea and slows down?
A delta
What mixes in an estuary?
a) Air and water
b) Rain and snow
c) Saltwater and freshwater
c) Saltwater and freshwater
What do humans sometimes dump in rivers that harms them?
Trash
There are _____ main stages in a river's course.
three
As rivers rush downhill, they wear away rocks and soil in a process called ______.
erosion
What can cause a river to flood its floodplain?
Heavy rain or melted snow
Which stage of the river is often steep and fast?
a) Upper course
b) Middle course
c) Lower course
A
What is the name for the land that may flood near a river?
Floodplain
Most river systems resemble a ____ with many branches.
tree
What are tributaries?
streams and minor rivers that join the main river
Why do some rivers dry up before reaching the ocean?
They pass through hot, dry areas
What makes the outside of a river bend erode faster?
Faster water flow
What do humans often build to collect river water for use?
Dams