How can erosion make a river deeper and wider?

How can erosion make a river deeper and wider?

Streams merge together to form larger streams or rivers. The bedrock beneath streams is also eroded by abrasion. Sediment flowing in the water can cut deeply into the bedrock. Over a long time, stream abrasion can cause great changes in the shape of a stream or river and Earth’s surface.

What type of erosion makes a river wider?

Lateral erosion makes a river wider. This occurs mostly in the middle and lower stages of a river.

Why a river grows wider and deeper as it nears the sea?

Velocity. As a river flows downstream, its velocity increases. The larger mass of water causes wider and deeper water channels in order to allow water in the river to flow more freely.

What is the bottom of a stream called?

stream bed
A stream bed or streambed is the channel bottom of a stream or river, the physical confine of the normal water flow. The lateral confines or channel margins are known as the stream banks or river banks, during all but flood stage.

How is erosion similar to the process of deposition?

A similar process, weathering, breaks down or dissolve s rock, but does not involve movement. Erosion is the opposite of deposition, the geological process in which earthen materials are deposited, or built up, on a landform. Most erosion is performed by liquid water, wind, or ice (usually in the form of a glacier ).

What causes a rill channel to become deeper?

Scrape against the bottom and the sides of the channel. This causes: more sediments to be knocked loose. When a small stream forms after heavy rains. Leaves a scar on the slope where it eroded the plants and soil. Definition: A rill channel becomes broader and deeper.

What happens when a glacier scrapes the ground?

When a glacier scrapes along the ground it plucks rocks out of the ground underneath, then carries them along until deposited – ice wedging. As rock is scrapped, water seeps in & freezes in these cracks, expands and breaks rock into pieces. Rock fragments move along the glacial ice.

Why are some rocks smoother than others in erosion?

Ice and liquid water can also contribute to physical erosion as their movement forces rocks to crash together or crack apart. Some rocks shatter and crumble, while others are worn away. River rocks are often much smoother than rocks found elsewhere, for instance, because they have been eroded by constant contact with other river rocks.