Mystery Category 1
Leftover water that flows over the ground surface is called?
Runoff
The smaller streams and rivers that feed into a main river.
Tributaries
One way rivers shape the land is by breaking away fragments of soil and rock and carrying them away. This is known as
erosion
A river's __________affects its ability erode the land. The faster it flows, the more energy it has.
Speed
The beginning of a river, or the source of its water.
Headwaters
The first factor that affects runoff is is how easily the water soaks into the ground this is determined by?
A river and all of its tributaries make up a ?
River System
When rivers take the eroded materials and leave them behind creating new land forms it is called
deposition
1st factor affecting river speed is ________________. That is, water flows faster downhill than across flat land.
steepness of slope
After the headwaters, the slope becomes less steep, tributaries join and the its channel is eroded.
Downriver
The second factor affecting runoff is _____________;when too much falls in a short time it can't soak into the ground.
rate of rainfall
What is a watershed?
the land area that that supplies water to a river system.
Sediments are:
the particle of rock and soil that are moved via erosion and deposition.
2nd factor affecting river speed is ______________. An increase in the amount of water in a river causes the river to flow faster.
volume (of water)
A broad flat valley through which a river flows.
flood plain
The third factor to affect runoff is whether the land is flat or hilly. This is because _____________pulls water downhill.
gravity
The name of a ridge of land that separates one watershed from another.
Divide
3rd factor affecting speed of a river is _____________ through which the river flows. As the water rubs against the sides and bottom of this it creates friction.
shape of the channel
Where the river slows down and deposits sediments it has carried. It may create a delta here.
mouth