Question

1. what is the largest particle that can be transported by a stream moving at 0.1 cm/s? pebbles
2. during heavy rainfall, a streams velocity increases from 5 cm/s to 100 cm/s. which new types of particles could the stream begin to carry? -
3. youre on a hike, and most of the sediment you see in a river are cobbles and pebbles. are you likely towards the beginning or end of the river? explain why you think that -

streambed & erosion application

1. where would you expect to find larger particles—on the inside or outside of a river bend? explain why. -
2. if the stream velocity is faster on the outer curve of a meander, which particles are likely to remain in motion there? -
3. why does silt and clay settle on the inner bank while pebbles and sand are found on the outer bank of a bend? -
4. during a flood, the stream velocity increases sharply. what changes in particle size might you observe along the streambed? -
5. if the velocity of a stream drops rapidly after a storm, which particles will settle first, and why? -
6. how does increased stream velocity affect the streams ability to erode particles? -
7. what types of particles are most easily eroded when the stream velocity is low? -
8. why are larger particles harder to erode even in fast - moving sections of a stream? -
9. how does stream velocity affect the depth and shape of a streambed over time? -
10. if the velocity of a stream increases from 10 cm/s to 100 cm/s, how will the rate of erosion change? -

additional practice questions

1. why do larger particles, such as boulders, require a higher stream velocity to be transported compared to smaller particles, like sand? -
2. why might silt and clay require a slightly higher velocity than you might expect, despite their small size? -
3. how might a flood, which increases stream velocity, affect the size of particles transported by a river? -

Explanation:

1. Outside of river bend for larger particles: Faster - moving water on the outside of a bend has more erosive power, carrying larger particles. Slower - moving water on the inside allows for deposition of smaller particles like silt and clay.
2. Larger particles remain in motion on outer curve: Higher velocity on the outer curve of a meander can keep larger, heavier particles in suspension and moving.
3. Silt and clay on inner bank, pebbles and sand on outer bank: The inner bank has lower velocity, causing fine - grained silt and clay to settle. The outer bank's higher velocity can carry and deposit coarser pebbles and sand.
4. Larger particles observed during flood: Increased velocity during a flood gives the stream more energy to transport larger particles that it couldn't before.
5. Larger particles settle first after storm: When velocity drops, larger particles have more mass and settle out of suspension more quickly due to gravity.
6. Increased stream velocity increases erosion ability: Faster - moving water has more kinetic energy, allowing it to dislodge and carry more particles, increasing erosion.
7. Silt and clay are most easily eroded at low velocity: These fine - grained particles have less mass and cohesion compared to larger particles, so low - velocity water can still move them.
8. Larger particles are harder to erode: They have more mass and require more force (higher stream velocity) to be dislodged and carried due to gravity and friction.
9. Stream velocity affects streambed depth and shape: Higher velocity erodes deeper and can create a more streamlined, V - shaped channel. Lower velocity leads to deposition and a flatter, wider channel.
10. Rate of erosion increases with velocity increase: More kinetic energy in faster - moving water means more particles can be eroded and transported, increasing the erosion rate.
11. Larger particles need higher velocity: They have more mass and greater resistance to movement, so more force (higher velocity) is needed to transport them.
12. Silt and clay may need higher velocity: They can clump together due to cohesion, requiring more force (higher velocity) to be dislodged and carried.
13. Flood increases particle size transported: The increased velocity during a flood enables the river to carry larger particles that it couldn't under normal conditions.

Answer:

1. Outside. Faster water on outer bend erodes more.
2. Larger particles. Higher velocity on outer curve supports them.
3. Inner bank has lower velocity for silt/clay; outer bank has higher velocity for pebbles/sand.
4. Larger particles will be observed as stream has more energy to carry them.
5. Larger particles. Greater mass causes them to settle due to gravity.
6. Increased velocity gives more kinetic energy for erosion.
7. Silt and clay. Low - velocity water can move these fine - grained particles.
8. More mass and greater resistance to movement.
9. Higher velocity erodes deeper and creates V - shaped channel; lower velocity leads to deposition and flatter/wider channel.
10. Rate of erosion increases as more particles can be eroded and transported.
11. Greater mass and resistance require more force (higher velocity).
12. They can clump together, needing more force to be moved.
13. Larger particles can be transported as velocity increases.