Kit Lesson 7: Where Does the Soil Go? Looking at Erosion and Deposition (PT)
Sediments are soil components that have been eroded and deposited by moving water. Fast moving water deposits sediments and upon entering a lake or ocean (mouth of the stream) the water slows and the sediments fall rapidly. The deposited sediment often forms a delta triangular shape), the process of sediment dropping off is deposition. The amount of sediment is called the load which can be of large magnitude within a large river (Ex: Mississippi River carries about 836,000 tons of sediment into the Gulf of Mexico daily). Water transports materials differently, if it is a solution the particles dissolve, if in a suspension they remain undissolved. When particles travel they can strike other particles which causes the stricken particles to round and reduce in size. The velocity/speed changes the amount of erosion and deposition. Steeper terrain and volume lead to greater velocity.
1. Write Like a Scientist:Explain where soil goes when erosion occurs. (DOK 2)
2. Claims, Evidence, & Reasoning Chart: State two claims. One claim will be that water makes soil wear away while the other states that soil is dropped off by water. You have 5 minutes to create evidence to back up their claims. Look at their flags within their soil box to see where soil is eroded or deposited and use knowledge of those two terms to explain to class members their claims.
2. Claims, Evidence, & Reasoning Chart: State two claims. One claim will be that water makes soil wear away while the other states that soil is dropped off by water. You have 5 minutes to create evidence to back up their claims. Look at their flags within their soil box to see where soil is eroded or deposited and use knowledge of those two terms to explain to class members their claims.