Erosion and Weathering

Chemical weathering is not a means of water erosion. Water erosion is primarily caused by physical processes such as water flow, abrasion, and transportation of sediment. Chemical weathering involves the breakdown of rocks through chemical reactions, which does not directly contribute to the physical removal of material by water.

Gradient affects a stream's erosive energy by determining the speed and steepness of its flow. A steeper gradient results in a faster flow velocity, which increases the stream's erosive power by allowing it to transport more sediment and erode the streambed more efficiently. Conversely, a gentler gradient leads to slower flow and reduced erosive capacity.

Water is typically the most powerful agent of deposition due to its ability to transport and deposit large amounts of sediment. This is especially true for rivers and streams, where flowing water can pick up and carry a variety of sediment sizes.

A young man runs down a city sidewalk, sweating and panting.

It is by respectively amending and covering soil that compost and mulch can prevent soil erosion. Compost puts fresh, nutrient-rich humus into the soil to improve aeration, drainage, fertility, moisture, structure, and texture while mulch holds soil in place, keeps moisture and temperature at proper levels, and puts nutrients back into the soil as it wears out after about 3+ years.

Wedging tree roots along natural joints in granite is a mechanical weathering process. The roots grow into the cracks and crevices, exerting pressure as they expand, which eventually causes the rock to break apart. This process is physical rather than involving any chemical reactions.

The dissolved load in a stream refers to the ions and minerals that are dissolved in the water. This load is carried along with the flow of the stream and can come from sources such as weathering of rock and human activities like agriculture and industry. It is an important component of the stream's total sediment load and can impact water quality and aquatic ecosystems.

False. Acid rain can cause chemical weathering, which is a slower process that breaks down minerals and rocks over time. Rapid mechanical weathering is typically caused by physical forces such as frost wedging or plant roots breaking up rocks.

Glacial erosion is the most common source of erosion in the high elevations of the Swiss Alps. As glaciers move downhill, they erode the underlying bedrock through processes like plucking and abrasion, shaping the landscape over time. The unique topography and jagged peaks of the Swiss Alps are largely a result of glacial erosion.

The main type of erosion in the Dust Bowl was wind erosion. This was caused by a combination of drought, overgrazing, and poor farming practices that left the soil exposed and vulnerable to being blown away by strong winds.

For sediment to be transformed into rock, a process called lithification must occur. This involves compaction and cementation of the sediment, where pressure squeezes out water and air pockets, leading to the formation of solid rock. Over time, additional processes like heat and pressure can further alter the rock into different types through metamorphism.

Chemical weathering can weaken rocks by altering their composition, making them more susceptible to mechanical weathering processes such as frost wedging or root growth. This can lead to the breakdown of rock into smaller fragments through physical forces.

Plowing brings up the good soil from beneath in order that the plants can get to the nutrients easily. However, if not planted, wind and rain will wash this good soil away leaving behind soil that will have to be left fallow in order that enough plants (as in weeds, etc...) grow and die in order to put nutrients back into the soil so that crops can once again grow to a healthy size. While crops can grow in poor soil, you also end up spending a lot of money on seed for a poor crop yeild. Hence, feilds must be left fallow at some point to get the nutrients back in the ground. The other means of getting those nutrients back in the ground is through fertalizer, but that can pollute our water table as well as lakes and streams if done too much due to runoff from the land. Florida uses collection ponds in neighborhoods to gather up that run off from neighborhood yards in order that the fertalizers used on lawns do not enter natural bodies of water. If soil is left too poor, then nothing will really grow in it that will hold it in place. This can result in a Dust Bowl as happened during the 30's in the central part of the United States. Modern farming practices prevent this from happening again. However, if there is a big enough drought, it could still happen again regardless.

Chemical weathering is faster in the tropics due to higher temperatures and abundant rainfall, which accelerate the chemical reactions that break down minerals in rocks. The warm and wet conditions in the tropics provide an ideal environment for chemical processes to occur more quickly compared to drier or colder regions. Additionally, the presence of more vegetation in the tropics can introduce organic acids that further enhance chemical weathering.

Wind is a primary source of erosion in arid regions such as deserts where there is limited vegetation to anchor the soil. It can also be a significant factor in coastal areas where strong winds can cause erosion of sand dunes and cliffs. Additionally, wind erosion can occur in agricultural areas where soil is left exposed without vegetation cover.

The letter "S" may come to mind when the word "meander" is applied to erosion, as it often describes the smooth, sinuous flow of a river that creates S-shaped bends in its path.

Rivers in mountains have steeper gradients, which lead to higher energy levels that increase erosion and transportation of sediments. Additionally, mountain rivers often have faster flow rates due to the elevational differences, further enhancing erosional processes. The presence of loose rock materials in mountains also makes them more susceptible to erosion compared to the typically more consolidated rock in plains.

After a deposition hearing, a decision is typically made by the authority handling the case based on the information and evidence presented during the deposition. The timing of the decision can vary depending on the complexity of the case and the specific legal procedures involved.

The main cause of beach erosion is large storms and hurricanes. With the high winds and the increased wave size, the water level rises up and washes away a portion of the beach. Over time, this can cause the beach to become smaller.

Most gorges are formed through water erosion. For example, waterfalls erode the rocks they fall over and the falls move gradually back - leaving a gorge behind them. Some gorges are formed as rift valleys; land stretches and a central area drops down - this has formed the Great Rift Valley in Africa and the Great Glen in Scotland.

Erosion involves rocks and soil being removed from the Earth's surface by wind or water. Deposition is the process where agents are moved from one place to another by erosion.

The term used to describe the process by which agents are carried from one place to another due to erosion is called "sediment transport." It involves the movement of soil, rocks, or other materials by wind, water, or ice.

The excess use of fertilizers does not of itself lead to soil erosion. It is agriculture - the clear felling and working of land that was once covered by trees or natural vegetation that leads to soil erosion. The roots of stable plants "bind" the soil - remove these plants and the soil will wash or blow away.

A mudflow is largelysilt and clay, unlike a flood which is primarily water. As a result, a mudflow is denser and so carries more force with which it may sweep away buildings scour at the ground and at stream channels. In some cases a mudflow has about the same density as concrete.