How do boulders become smaller as they are moved down a stream bed?

1. How does erosion alter the bed and valleys of the river?
2. Where a river flows from an area of harder rock to an area of softer rock?
3. Where a river flows from an area of harder rock to an area of softer rock the softer rock may wear away eventually forming a drop called a n quizlet?
4. What causes sediments to slowly move downhill?
5. Why do rocks get smaller downstream?
6. In what type of sediment transport are large rocks and boulders dragged along by the river?
7. What is the process by which a glacier loosens and moves rocks?
8. What happens to the speed of a river as more water flows through it?
9. Does a valley glacier spreads out over a large island or continent?
10. What do you call a river that flows into another river?
11. What does wind erode by quizlet?
12. How do rocks and soil move down slope?
13. What happens when a stream slows down?
14. What is gravity causing rock or sediment move downhill?

How does erosion alter the bed and valleys of the river?

V-Shaped valleys are found in the upper course of the river and are a result of both erosion by the river and weathering. ... When the river's discharge is high, it is able to transport its large bedload by traction eroding the river's bed and valley by corrasion, deepening it.

Where a river flows from an area of harder rock to an area of softer rock?

A waterfall forms where a stream flows from an area of harder to softer rock (Figure below). The water erodes the softer rock faster than the harder rock. This causes the stream bed to drop down, like a step. This creates a waterfall.

Where a river flows from an area of harder rock to an area of softer rock the softer rock may wear away eventually forming a drop called a n quizlet?

What is feature A, and how does it form? Feature A is a waterfall. A waterfall forms where a river flows over a spot where a layer of harder rock overlies a layer of softer rock. The water more easily erodes the layer of softer rock, which then no longer supports the layer of harder rock above.

What causes sediments to slowly move downhill?

gravity pulls rock or sediment down slopes. sediments move downhill slowly.

Why do rocks get smaller downstream?

This is because the further downstream material is carried then the greater the time available for it to be eroded by attrition and abrasion which makes rocks and stones smaller and rounder.

In what type of sediment transport are large rocks and boulders dragged along by the river?

Traction - quite large stones can be rolled or dragged along the river bed by the force of the water.

What is the process by which a glacier loosens and moves rocks?

Glaciers erode the underlying rock by abrasion and plucking. Glacial meltwater seeps into cracks of the underlying rock, the water freezes and pushes pieces of rock outward. The rock is then plucked out and carried away by the flowing ice of the moving glacier (Figure below).

What happens to the speed of a river as more water flows through it?

As more water flows through a river, it's speed will increase too. This relates to having more volume of water in the channel of the river.

Does a valley glacier spreads out over a large island or continent?

Continental glaciers never melt. A valley glacier spreads out over a large island or continent. Once the depth of snow and ice reaches more than 30 to 40 meters, the force of friction begins to pull a glacier downhill.

What do you call a river that flows into another river?

A tributary is a freshwater stream that feeds into a larger stream, river or other body of water. The larger, or parent, river is called the mainstem.

What does wind erode by quizlet?

As wind blows over the ground it picks up small particles of sediment in the process of deflation. The stronger the wind, the larger the particles it erodes. Wind causes erosion through ablation and abrasion. Abrasion can polish rock surfaces.

How do rocks and soil move down slope?

mass movement, also called Mass Wasting, bulk movements of soil and rock debris down slopes in response to the pull of gravity, or the rapid or gradual sinking of the Earth's ground surface in a predominantly vertical direction.

What happens when a stream slows down?

When a stream or river slows down, it starts dropping its sediments. Larger sediments are dropped in steep areas, but smaller sediments can still be carried. Smaller sediments are dropped as the slope becomes less steep.

What is gravity causing rock or sediment move downhill?

When gravity alone causes rock or sediment to move down a slope, the erosion is called mass movement. Mass movements can occur anywhere there are hills or mountains.