Rivers

Question 1

What are the four types of erosion?

Answer 1

1. Solution
2. Attrition
3. Abrasion
4. Hydraulic Action

Question 2

What is Hydraulic Action?

Answer 2

Hydraulic Action is the sheer force of the water hitting against the rock.

Question 3

What is Abrasion?

Answer 3

It is when the rock rubes across the surface across the surface to wear away, just like sandpaper.

Question 4

What is Solution? (erosion)

Answer 4

A solution is when the acid in the water breaks small rocks.

Question 5

What is Attrition?

Answer 5

It is when two rocks collide with each other to become smaller.

Question 6

What are the types of transportation?

Answer 6

1. Suspension
2. Traction
3. Saltation
4. Solution

Question 7

What is Suspension?

Answer 7

It is when the rock floats due to its size.

Question 8

What is traction?

Answer 8

It is when the big rocks get rolled on the surface.

Question 9

What is Saltation?

Answer 9

It is when the smaller rocks bounce off the surface.

Question 10

What is solution? (transportation)

Answer 10

It is when the rock is dissolved in the water.

Question 11

What is deposition?

Answer 11

When the material is dropped usually on a shore.

Question 12

What are the 8 steps for how a waterfall is formed?

Answer 12

1. Waterfalls are often formed where a layer of harder rock overlays a layer of softer rock.
2. As the river passes over the softer rock, and then the softer rock erodes at a faster rate, forming a step in the river bed.
3. Due to certain types of erosion (mostly hydraulic action and abrasion), it will make the notch deeper.
4. A plunge pool is developed.
5. Eventually, there is no support for the hard rock on top.
6. Later the hard rock collapses into what is called a plunge pool.
7. The process repeats and the water retreats.
8. A gorge is formed by the waterfall retreats.