Name: _________________________________ Date: ___________ Period_______

Quiz: River Erosion

Water moves, or erodes, the most sediment of the 4 agents. The river will hit the outside bank in a bend straight on and its force will eat away, erode, the outside bank. On the inside of the bend, the water does flows slower, so sediments will be deposited there.

1. Label the picture where EROSION is taking place and DEPOSITION is taking place.

__________________ _________________

An overhead view of a simple stream. The arrows show the direction of water flow.

2. Which two letters are the inner banks? ________ & _______

3. Which two letters are the outer banks? __________ & _______

4. Which letters are most likely experiencing the fastest velocity and the most stream erosion?

A. A & B B. D & C

C. A & D D. B & C

5. Which letters are most likely experiencing the slowest velocity and deposition creating a sand bar?

A. A & B B. D & C

C. A & D D. B & C

RIVER EROISION QUIZ PG 1

DC

B

A

In a cross-section view, the water that is flowing against the river bed (bottom) or the sides (banks) will experience friction and flow slower than the water in the center and middle of the river.

6. Label the three boxes with the word FRICTION where water would be experiencing slower flow due to flowing against the bottom or sides.

Cross cut section of a stream.

8. Which letter shows the greatest velocity (speed)?

A. W B. X X W YC. Y D. Z

9. Which letters show areas of friction and slowest Z velocity? Circle all three apply

A. W B. X

C. Y D. Z

Material is transported by water in different methods depending on the density and chemical structure.Match the following material with the type of water transportation in a river system.

clay partials sticks & branch Large rocks salt ions pebbles & sand

10. Floatation (on top of the surface of the water) _________________________

11. Solution (dissolved in the water, like Kool-Aid powder) __________________________

12. Suspension (floating in mid-level, not at the top or bottom) __________________________

13. Traction (pushed, rolled, along the bottom of the river bed) __________________________

14. Saltation (Bouncing and skipping off the river bed) __________________________

RIVER EROISION QUIZ PG 2