1. AIM: What is a stream/river? Do Now: Answer the following questions in your notebooks. Where does the water come from that fills streams and rivers? Where do streams and rivers begin?

2. I. Source of Stream Water begin at higher elevations water comes from: -Rain fall -Glacial Melting -Underground (especially when it has not rained for a while)

3. II. Describing streams The amount of water moving in the stream/river. Discharge: Velocity: Gradient Speed at which the water is moving Steepness of the land (formula in ESRT)

4. Stream/River Stream/River System bending and turning of a stream channel (wander). start of the stream/river. (Headwaters) Tributaries small streams path the water follows. end of the stream/river sides of the channel Bank

5. Source vs. Mouth Channel = Gradient = Discharge = *Velocity = Channel = Gradient = Discharge = *Velocity = Gentle Gradient narrow steep less wide gentle greater *MORE WATER = FASTER VELOCITY *LESS WATER = SLOWER VELOCITY

6. depends greatly on stream velocity, gradient and discharge. dominant agent of erosion and deposition on Earth. What words would you use to describe this river? Meandering (wandering) Gentle Slope

7. Aim: How do streams/rivers change the landscape? Do Now: In your note books, explain how the velocity of a stream/river affects it’s ability to erode and deposit?

8. The more velocity a river has, the more erosion occurs. The outside bank of a channel has the greatest velocity and therefore more erosion.

9. Bed Load- bouncing or rolling Streams/Rivers erode (transport) materials in three ways: (floating in middle) (can’t see material) (too large to suspend)

10. As sediments are eroded they become rounder and smaller in the stream.

11. Narrow V-shaped valley’s are created as streams/rivers erode away bedrock.

12. - Take a worksheet from the back top bin - Take out your ESRT and turn to page 6 * Each section counts by the place value listed at the beginning.

13. - as stream/river velocity (speed) decreases, sediments can no longer be carried. - The inside banks has the lowest velocity and therefore more deposition.

14. What causes a river to decrease velocity? What size sediment will deposit first? Why? -velocity decreases when the river enters a large body of water (lake or ocean). This causes large sediment to deposit first and smaller sediment to be carried further into the body of water. -This causes the sediments to be sorted.

15. Deltas and Alluvial fans are an accumulation of fine sediment at the mouth of a stream/river. What size sediments do you think make up the deltas and alluvial fans? Why? Silt and Clay

16. Outer bank is greater velocity and erosion Inner bank is lower velocity and deposition Describe the velocity on the inside and outside of the bank. What occurs because of this change in velocity? Oxbow Lakes are created as rivers move across the land making their channels straight. –found on older rivers

17. Oxbow lake animation

18. Meandering River Cross Section Diagram greatest velocity on a straight channel occurs in the upper- middle portion of the river. greatest velocity on a curved river occurs in the middle but closer to the outside bank. B

19. 1)At which letters does erosion occur? 2)At which letters does deposition occur? A B C D 1)A and D 2) B and C

20. In your Review books; Page 141-143 # 1-11 1.2.3.4.5. 6.7.8.9.10. 11. 33123 1141 4 4