why dense soils develop negative excess pore pressures when they are sheared in undrained conditions

Answers

Answer 1
Dense soils develop negative excess pore pressures when they are sheared in undrained conditions due to the inability of water to escape from the soil during the shearing process.

During undrained shearing, the soil is not able to drain water out of the pores because the rate of deformation is faster than the rate at which water can escape. This causes the water to become trapped in the pores, resulting in an increase in pore pressure. As the shearing continues, the excess pore pressure continues to increase until it reaches a point where the soil can no longer withstand the pressure and begins to fail.

In dense soils, the soil particles are tightly packed together, leaving little space for water to escape. This leads to a more significant increase in pore pressure during undrained shearing. The negative excess pore pressure that develops in these conditions can cause the soil to lose its strength, leading to liquefaction and other forms of soil failure.

Overall, understanding how soils respond to undrained shearing is important for engineering projects such as building foundations, embankments, and retaining walls. By accounting for the effects of negative excess pore pressures in dense soils, engineers can design structures that are more resilient and less prone to failure.
Answer 2

When dense soils are sheared in undrained conditions, negative excess pore pressures develop because of their low permeability. Because of the small size of their soil grains and the lack of conduits in the soil matrix, resulting in water remaining trapped in the soil.

During undrained loading, pore water pressure develops as a result of the weight of the soil and the trapped water. Because the pore water can't escape because of the low permeability of dense soils, a negative excess pore pressure develops in the soil matrix as the soil is sheared.

This occurs as a result of the soil matrix's inability to dissipate the excess pore water pressure that has developed. Therefore, it is suggested that an appropriate drainage system be established before building a structure on a soil to avoid issues due to undrained loading.

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Related Questions

the difference between trade barriers and migration barriers.

Answers

trade barriers are government induced restrictions on international trade while migration barriers slow or stop the movement from one place to another. an example of a trade barrier would be a tariff which puts taxes on imports and sometimes exports.

how does groundwater create caverns? how does groundwater create caverns? caverns are created when pure groundwater dissolves and carries away limestone. caverns are created when pure groundwater dissolves and carries away grains from sandstone, shale, and other rocks. caverns are created when acidic groundwater dissolves and carries away grains from sandstone, shale, and other rocks. caverns are created when moving groundwater mechanically weathers sediment and transports it elsewhere, leaving behind large empty spaces. caverns are created when acidic groundwater dissolves and carries away limestone.

Answers

Groundwater creates caverns by dissolving and carrying away limestone.

This creates large empty spaces, which can lead to the formation of caverns. When groundwater is acidic, it can also dissolve grains from sandstone, shale, and other rocks, contributing to the formation of caverns.

Caverns are underground caves or chambers that form when groundwater erodes and dissolves the underlying rock.

The process of cavern formation is a slow one, taking thousands of years to form even the smallest of caves. Groundwater is a major contributor to the formation of caverns as it has the ability to dissolve and carry away rocks and minerals.

When groundwater is pure, it dissolves limestone, which creates large empty spaces. Over time, these spaces can become larger and form caverns.

Additionally, when groundwater is acidic, it can dissolve grains from sandstone, shale, and other rocks. This can also contribute to the formation of caverns. Mechanical weathering from moving groundwater can also lead to the formation of caverns as sediment is transported away, leaving behind large empty spaces.

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What's the meaning of The Coriolis Effect ?

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The Coriolis Effect refers to the phenomenon in which objects or substances moving in a straight line appear to move to the right or left of their expected path, depending on their location on Earth.

This phenomenon is caused by the Earth's rotation, which creates a deflection force on moving objects. It is named after the French mathematician Gustave-Gaspard Coriolis, who first described the effect in 1835.

The Coriolis Effect can be observed in a number of different contexts, including the movement of air masses, ocean currents, and ballistic missiles.

In the case of air masses, for example, the rotation of the Earth causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This creates patterns of air movement that influence the climate and weather patterns in different regions of the world.

In ocean currents, the Coriolis Effect helps to create large, circular systems of ocean currents that help to distribute heat and nutrients around the planet.

And in the case of ballistic missiles, the Coriolis Effect must be taken into account when aiming missiles in order to ensure that they reach their intended targets.

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How has the change from small scale family farms to large scale corporate farms harmed our environment and it’s natural resources? Earth science

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The shift from small-scale family farms to large-scale corporate farms has had several negative impacts on the environment and its natural resources. Here are some of the ways in which large-scale corporate farms have harmed the environment:

1. Soil degradation: Large-scale corporate farms often rely on intensive monoculture practices, where a single crop is grown on the same plot of land year after year. This can lead to soil degradation, as the same nutrients are extracted from the soil without being replaced, and the soil becomes compacted and less able to hold water.

2. Water pollution: Corporate farms often use large amounts of fertilizers and pesticides, which can leach into nearby waterways and contaminate groundwater. This can harm aquatic ecosystems and make water resources unsuitable for human and animal consumption.

3. Deforestation: Large-scale corporate farms often require clearing large areas of land, which can lead to deforestation and loss of habitat for wildlife. This can also contribute to climate change, as trees absorb carbon dioxide from the atmosphere and store it in their biomass.

4. Loss of biodiversity: Monoculture practices on large-scale corporate farms can lead to a loss of biodiversity, as only a single crop is grown on a given plot of land. This can harm pollinators and other wildlife that depend on diverse habitats for food and shelter.

5. Air pollution: Large-scale corporate farms often use machinery and equipment that run on fossil fuels, which can contribute to air pollution and climate change.

Overall, the shift from small-scale family farms to large-scale corporate farms has had significant negative impacts on the environment and its natural resources. It is important to develop more sustainable agricultural practices that prioritize soil health, water quality, biodiversity, and climate resilience.

certain types of sandstone can be converted to quartize which is much harder and is used in many buildings materials. the production of this metamorphic rock would require which conditions?

Answers

Answer:

Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts.

Explanation:

how did you form magma? where on the landscape did the magma form?

Answers

Answer:

Magma is forms from partial melting of mantle rocks.

Magma is produced by melting of the mantle or the crust in various tectonic settings, which on Earth include subduction zones, continental rift zones, mid-ocean ridges and hotspots

Explanation:

why may social diversity be seen as one of Nigeria's strengths

Answers

Answer:

diversity makes it possible for Nigeria to be one of the most culturally significant nations in the world.

Answer: Check Below

Explanation:

Nigeria is a diverse country with a population of over 200 million people, made up of more than 250 ethnic groups. The country's diversity can be seen as one of its strengths, as it presents a unique blend of cultures, languages, and traditions. This diversity is a source of social and economic strength, as it allows Nigerians to learn from each other and appreciate their differences. For example, people from different ethnic groups can share their food, music, and art, leading to a rich cultural exchange that helps to strengthen the social fabric of the country.

which type of landform is smaller and rounder than a mountain? which type of landform is high, flat land that is higher than the land around it?

Answers

A hill and a plateau

when does daylight savings time end permanently 2023?

Answers

When daylight savings time will end permanently in 2023. It depends on the country or region where you live. In some places, daylight savings time is not observed at all, while in others, it may be observed for part of the year or all year round.

In the United States, daylight savings time is observed from the second Sunday of March to the first Sunday of November. Therefore, in 2023, daylight savings time will begin on March 12 and end on November 5. However, it is important to note that the rules regarding daylight savings time in the United States can change at any time.

In Europe, daylight savings time begins on the last Sunday of March and ends on the last Sunday of October. Therefore, in 2023, daylight savings time will begin on March 26 and end on October 29. Again, it is important to note that these rules can change.

In conclusion, the answer to the question of when daylight savings time will end permanently in 2023 depends on the country or region where you live. It is important to consult local authorities or news sources to find out the rules regarding daylight savings time in your area.

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is this statement true or false?an archipelago is a narrow strip of land connecting two larger landmasses.

Answers

Answer:

False. An archipelago is a group of islands. An isthmus is a narrow strip of land connecting two larger landmasses.

(true or false) many geologists believe that it is magnetism that ultimately drives sea-floor spreading

Answers

Many geologists believe that it is magnetism that ultimately drives sea-floor spreading. For that reason, the correct option is true.

Sea-floor spreading is a geological phenomenon in which tectonic plates are pulled apart, allowing new oceanic crust to form. This process takes place along mid-ocean ridges, where molten material rises up from the mantle and cools to form new crust as the plates move apart.

What is magnetism?

Magnetism is a property of certain materials that allows them to attract or repel other materials. This is due to the alignment of the electrons in these materials, which causes them to produce a magnetic field. The Earth is itself a magnet, with a magnetic field that extends out into space.

Many geologists believe that it is magnetism that ultimately drives sea-floor spreading because of the discovery of magnetic anomalies along mid-ocean ridges. These anomalies indicate that the Earth's magnetic field has changed over time, with alternating bands of normal and reversed polarity.

The pattern of these bands is mirrored on either side of the mid-ocean ridge, indicating that new crust is being formed on either side as the plates move apart. This led geologists to conclude that the magnetic field is somehow involved in the process of sea-floor spreading.

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why do the effects of climate change on freshwaters systems have very large consequences for biodiversity and human endeavors?

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The effects of climate change on freshwater systems have very large consequences for biodiversity and human endeavors because freshwater is a critical resource for both. Here are some reasons why:

1. Biodiversity: Freshwater ecosystems are home to a wide variety of plants and animals, many of which are unique and found nowhere else on Earth. Climate change can alter the temperature, flow, and chemistry of freshwater systems, which can have significant impacts on the plants and animals that live there. For example, changes in water temperature can affect the reproduction and survival of fish and other aquatic species, while changes in water chemistry can harm sensitive species like amphibians and mollusks.

2. Human endeavors: Freshwater systems are also critical resources for human societies, providing water for drinking, irrigation, and industrial uses. Climate change can alter the availability and quality of freshwater resources, which can have significant impacts on human health, food security, and economic development. For example, changes in precipitation patterns can affect the amount and timing of water available for agriculture, while changes in water quality can affect the safety of drinking water sources.

Overall, the effects of climate change on freshwater systems can have far-reaching and long-lasting consequences for both biodiversity and human endeavors. It is important to develop strategies to mitigate and adapt to these impacts in order to safeguard these critical resources for future generations.

Climate change has a dramatic effect on freshwater systems, resulting in very large consequences for biodiversity and human endeavors. Rising temperatures cause water to evaporate faster, reducing water levels in rivers and lakes and diminishing the habitat for aquatic organisms.

Warmer waters also make it harder for fish to breathe, as they require oxygen-rich cold water to survive. As water levels decline, the diversity of aquatic organisms is reduced. As water levels decrease, saltwater may enter the freshwater system, contaminating it. This affects the species that live in it and reduces the availability of freshwater for drinking, cooking, and bathing.

Humans are also impacted by climate change in freshwater systems as it threatens food security, fishing, and recreation. People who rely on fishing for their livelihood are especially vulnerable to climate change, as their livelihoods depend on healthy freshwater ecosystems.

Climate change also affects water quality in freshwater systems. As temperatures rise, more nutrients, such as nitrogen and phosphorus, enter the water. This can cause eutrophication, which leads to algal blooms, the death of aquatic organisms, and the disruption of food webs. These effects of climate change on freshwater systems have very large consequences for biodiversity and human endeavors.

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In your opinion,what two specific continents fit together most noticeably?​

Answers

In my opinion, the two continents that fit together most noticeably are Europe and Asia.

These two continents have a long shared history, with many cultural and geographical similarities. For example, both continents have many mountain ranges, large bodies of water, and diverse climates. Historically, there were many migrations and invasions between the two continents, which has resulted in a shared culture, language, and religion in many areas.

Additionally, there are many similarities between the political systems of the two continents. For example, both have democracies and communist governments, and both have experienced revolutions and civil wars.

Furthermore, there is a great deal of economic and trade activity between Europe and Asia, with many countries in both continents relying heavily on one another for resources. Ultimately, these two continents fit together most noticeably due to their shared history, cultural and geographical similarities, and strong economic and political ties.

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why the earth is round?

Answers

Cause God made it that way.

Answer:

Earth is round because of gravity.

Explanation:

Fun fact: Earth isn't fully round it has craters because of asteroidd.so earth has dents in it.

there is an increase in precipitation over an ocean. how is the salinity of the seawater affected?

Answers

An increase in precipitation over an ocean can potentially reduce the salinity of seawater. Precipitation is essentially freshwater that has evaporated from the ocean and then condensed in the atmosphere before falling back into the ocean as rain or snow.

When this freshwater falls on the ocean surface, it can mix with the surrounding seawater, diluting the salt content and reducing the overall salinity. This can have significant impacts on ocean ecosystems, as many marine organisms are adapted to specific salinity levels and may be unable to tolerate large fluctuations in salinity. However, it's important to note that the impact of increased precipitation on salinity can depend on various factors, including the location and intensity of the precipitation, as well as the ocean currents and wind patterns in the region. For example, if the increased precipitation is concentrated in coastal regions or areas where rivers flow into the ocean, it may have a greater impact on salinity levels in those areas compared to open ocean regions. Overall, while increased precipitation over an ocean can potentially reduce the salinity of seawater, the impact can be complex and dependent on a range of factors.

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What is a common rock that can be dissolved by water and weak acids? A. quartzite. B. quartz-rich sandstone. C. limestone. D. all of these. Show more.

Answers

Quartzite, quartz-rich sandstone, and limestone are all rocks that can be dissolved by water and weak acids therefore the correct option is D.

Quartzite is a  gemstone formed from sandstone that has been  subordinated to extreme heat and pressure. The quartz grains in the sandstone remain and are held together by a silica cement. This makes quartzite extremely resistant to riding . Quartz-rich sandstone is a sedimentary  gemstone that consists of  substantially quartz grains held

together by a  complexion matrix. Quartz is also resistant to riding , and the  complexion matrix can be dissolved by water and weak acids. Limestone is a sedimentary  gemstone composed primarily of calcium carbonate, which can be dissolved by weak acids like  ginger. This process is called carbonation.

Hence the correct option is D.

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What is the area of this polygon?

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the area of this polygon is 43.5 units². A regular polygon's area is calculated by multiplying its perimeter by its apex. The area is equal to 1/2 of an apothem's length, where stands for the length and p.

Dimensions of the polygon = Area of CDE + Area of EFG + Area of ABCF

Size of the triangle CDE = 1/2(BASE)(HEIGHT)

                                  = 1/2(3)(2)

                                  = 3 units²

Domain of CDE = 1/2(5)(1)

                      = 2.5 units²

Area of ABCF trapezoid = 1/2(b₁+b₂)h

                                       = 1/2(8+11)4

                                        = 38 units²

Size of the provided polygon = 3 + 2.5 + 38

                                           = 43.5 units²

A polygon is a two-dimensional closed shape with straight sides. It can have any number of sides, but typically, polygons have three or more sides. Triangles, squares, rectangles, pentagons, hexagons, heptagons, octagons, and nonagons are all examples of polygons. Polygons can be regular or irregular, depending on whether their sides and angles are all equal or not.

The area of a polygon is the measure of the region enclosed by its sides. The formula for finding the area of a polygon varies depending on its shape and characteristics. For regular polygons, the area formula involves the length of one side, the apothem (the perpendicular distance from the center of the polygon to a side), and the number of sides. For irregular polygons, the area formula can be more complex and may involve dividing the polygon into smaller shapes, such as triangles or trapezoids.

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discuss the path of tropical cyclone eloise

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Answer: Tropical Cyclone Eloise, the strongest tropical cyclone had an impact on the country of Mozambique from 2019 to 20221.

Explanation: The seventh tropical depression, and second tropical cyclone of the season, Eloise's origin was over the central portion of the south-west Indian ocean basin which form into a disaster on 16 January, and developed into a tropical storm on 17 January,  gaining its strength day by day Eloise made landfall in northern Madagascar and brought heavy rainfall and flooding. Entered the Mozambique Channel on 21 January, Because of low wind shear and high sea surface temperatures it peaked resulting in a landfall at Beira, Mozambique before it weakened. Slowly weakened on 25 January.

What is the International Nuclear Event Scale?

Answers

Answer:A tool for communicating the safety significance of nuclear and radiological events to the public

Explanation:

one in-flight condition necessary for structural icing to form is called

Answers

The in-flight condition necessary for structural icing to form is known as supercooled liquid water.

This occurs when  driblets of liquid water  live in a  pall at temperatures below freezing, but haven't yet  firmed  into ice chargers. In order for structural icing to form, the  driblets must come into contact with an exposed structure on an aircraft,  similar as an airfoil, propeller blade, or  sect.

As the  driblets come into contact with the structure, they  indurate  incontinently and form a layer of ice. The ice  layer also begins to accumulate until it forms a thick enough  layer to  intrude with the aircraft's performance, leading to structural icing.

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What was the purpose for the development of the reservation system for American Indians in the United States?

Answers

The reservation system for American Indians in the United States was created in order to protect the nation’s Indigenous population from the influx of European settlers and the military advances against them.

The policy was based on a “divide and conquer” strategy, in which Indigenous tribes were forcibly relocated to certain areas, which would later become reservations. The federal government hoped that by segregating Native Americans into their own territories, they would be able to protect them from the settler population and the military advances of the United States.

The policy was also aimed at assimilating Native Americans into the dominant white American culture, which was seen as a way to “civilize” them. Ultimately, the reservation system not only failed to provide protection for Indigenous people, but also led to the erosion of their traditional ways of life and cultures.

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Why did Maori groups settle on New Zealand's North Island Volcanic Plateau?

Responses

a. The area has grass for sheep to graze on.
b. The area has rocks to use for building shelters.
c. The area has rivers for transportation..
d. The area has lakes to provide water.

Answers

Māori arrived in the vicinity from about 1300. They settled round the lakes and geothermal areas, where they should use the clean water, hot swimming pools and steam.

Why are there volcanoes in North Island New Zealand?

Pacific Ring of Fire

A plate boundary lies simply east of the North Island of New Zealand, where the Pacific Plate slides beneath the Indian-Australian Plate. This region of 'subduction' has created a line of volcanoes which stretches from the pacific island of Tonga to Ruapehu.

In any other myth, the volcanoes Tongariro, Taranaki, and Ruapehu have been all giants. Taranaki and Ruapehu fell in love with Tongariro and proceeded to fight for her. Taranaki threw himself at Ruapehu, however Ruapehu sprayed scalding water from his lake one Taranaki.

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The Best part of the article was…..
I thought it was very interesting when…..
This reminds me……
I never knew that…..
This made me want to learn more….
It was interesting when …...
I did not like…..
I think that the article should change…..
I found …… hard to follow because……
It would have been easier to understand if....
One thing that was confusing was … because…..

(1) What are two things that you enjoyed about this article?






(2) What is something that you would improve or change about this article?

Answers

(1) I enjoyed learning about the history and culture of the region, as well as the vivid descriptions of the natural beauty of the area.

(2) I think the article would have been easier to understand if there had been more visuals, such as photographs or maps.

What is region?

Region is an area or a part of a larger area that is distinguished by certain characteristics or features. These features may include physical attributes such as landforms, climates, soils, vegetation, and natural resources, or they may include cultural characteristics such as language, religion, economic activity, political systems, and population characteristics. Regions can be divided into smaller units such as provinces, states, counties, cities, or towns. Regions have been used to define territories and to organize administrative units throughout history. They are also used to help people understand the world and to study the relationships between different parts of the world. Regions are also used in marketing and business strategy, as they help to identify distinct groups of people with similar needs and desires. Regions are important for the study of geography, sociology, and anthropology, as they provide insight into the diversity of cultures and peoples.

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it is permissible to enter an excavation to get a soil sample. true/false

Answers

The given statement "It is not permissible to enter an excavation to get a soil sample" is true because without proper safety precautions and authorization, as it can be dangerous and pose a risk to the person entering the excavation.

An excavation is a hole or trench dug in the ground, typically for archaeological or construction purposes. Excavations can be dangerous, and people who enter them are at risk of injury or death. As a result, strict safety protocols must be followed when entering an excavation.

Sometimes, it may be necessary to enter an excavation to obtain a soil sample. In such cases, proper safety equipment and procedures must be followed to ensure the safety of everyone involved.

If the appropriate safety protocols are followed, it is permissible to enter an excavation to obtain a soil sample. Therefore, the answer to the student question is true.

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9.1 explain the close connection among latitude, regional climates, and agricultural production in russia.

Answers

Latitude plays a significant role in determining the regional climate in Russia. Russia is the world's largest country, stretching over 11 time zones, and its climate varies considerably from region to region.

The northern regions of Russia experience subarctic and Arctic climates, while the southern regions have a humid continental climate. Agricultural production in Russia is highly dependent on its regional climate. For example, in the northern regions, the growing season is short due to a cold climate, making it difficult to grow crops. In contrast, the southern regions have a longer growing season and more favorable climate for agriculture. The major agricultural regions in Russia are located in the southern part of the country, where the climate is more favorable for crop production. Therefore, the close connection among latitude, regional climates, and agricultural production in Russia is critical to understanding the country's economy and food security.

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does water spin differently in different hemispheres?

Answers

Yes, it spins in a different direction once you go past the equator.

what is the township and range system? what does the township and range system look like on the landscape (insert picture)?

Answers

The Township and Range System is a rectangular survey system developed in the United States in the late 1700s. It divides land into a grid of 36 square-mile sections called townships, with the lines of each township running north and south, and east and west.

Each township is further divided into 36 one-square-mile sections, with the lines running in the same direction. Each section is numbered, starting with section 1 in the northeast corner of the township and ending with section 36 in the southwest corner.

The Township and Range System is easily seen on the landscape. Every 6 square miles is a township, and each square mile is further divided into 36 sections. Township lines run north and south, and range lines run east and west, forming a grid across the landscape.

The Township and Range System was adopted in 1785 and is still in use today. It is used for land surveys, deed descriptions, and property lines. It is also used in mapping, as the grid of lines allows for the precise location of features and boundaries.

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Please help! I'll give brainliest and worth 50 points!!

You have learned about life in Ecuador, Peru, and Bolivia. In this report, you will learn more about a city in one of these countries.

Choose a city in Ecuador, Peru, or Bolivia. Look up all the information you can find about it. Then write a 150 word report about the city of your choice.

Answers

Ecuador is a popular tourist destination and a significant petroleum exporter. Political and economic difficulties, such as prolonged military rule, boom-and-bust cycles, and unequal wealth distributions .

What distinguishes Ecuador?

Ecuador is a republic that still has a presidential representative democracy with three branches of government: legislative (national assembly), executive (government), and judicial (judiciary). Legislation can be passed by the national assembly. The executive and legislative branches do not have any influence over the supreme court.

Everyone can find something in Ecuador! The fascinating Amazonia, the fruity Coast, and the magical Galapagos Islands are just a few of its stunning mountain ranges. Ecuador is a tiny nation in the northwestern part of South America. Ecuador is a safe place for female solo travelers. In point of fact, it's more than just secure. It's elating, it's delightful, spending plan amicable and fun. You can navigate this diverse country with just a little Spanish, and we promise you'll meet some new friends along the way.

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What is the largest lake in africa it borders uganda and kenya?

Answers

Answer:

Lake Victoria

Explanation:

only the sizes and shapes of rocks change during weathering. a. mechanical b. chemical c. reaction d. shape 2. the makeup of rocks is changed during weathering. a. mechanical b. chemical c. reaction d. shape 3. how are weathering by vegetation and freezing/thawing similar? a. they are both types of chemical weathering b. they are both occur in very warm climates c. they both expand cracks in rock, causing rock to break apart d. they both are found only at divergent plate boundaries 4. although we did not observe a scene with small burrowing animals, what effect would they have on the rock and soil in the area? a. they would cause mechanical weathering as they dig into the rock and soil, breaking it into smaller pieces of the same material. b. they would cause chemical weathering as they dig into the rock and soil, breaking it into smaller pieces of the same material. c. they would cause expansion of rock as they heat rock from below. d. they would cause contraction of rock as they cause collapse in rock and soil due to the burrows that they made. 5. in terms of weathering, what would happen to a set of metal tools left outdoors in the rain for a long time? a. they would oxidize b. they would turn to clay c. they would dissolve d. they would erode 6. when water freezes in a crack in a rock, it , causing the crack to widen and eventually the rock breaks apart. a. multiplies b. contracts c. expands d. percolates 7. water from rain or groundwater can mix with carbon dioxide in the air or from decaying organic material to form a weak acid called . a. hydrochloric acid b. hydrofluoric acid c. acetic acid d. carbonic acid 8. caverns can form when what type of rock is dissolved? a. granite b. sandstone c. limestone d. shale 9. why are many rocks in the grand canyon a reddish color? a. iron rich minerals in those layers have oxidized b. feldspar minerals in those layers have turned to clay c. halite minerals in those layers have dissolved d. rocks in this area have eroded 10. plant roots can cause weathering by wedging apart rocks and sediment, and can also cause weathering by decaying plant roots producing acids that dissolve minerals in rocks. a. mechanical; chemical b. chemical; mechanical c. reaction; shape d. shape; reaction 11. in scene 1, what was the result of water as a weathering agent? a. the sandstone was deposited on top of the limestone b. the cave to grew larger and stalactites and stalagmites formed. c. new material was brought to the area, filling in the cave and closing it up. d. water burrowed through the area, except for where stalactites and stalagmites were. 12. in scene 1, what was the result of oxidation? a. the sandstone was oxidized, staining the sandstone red. b. the sandstone was deposited on top of the limestone c. the cave to grew larger and stalactites and stalagmites formed. d. new material was brought to the area, filling in the cave and closing it up. 13. in scene 2, what was the result of repeated freezing and thawing? a. rocks broke down and formed a talus slope b. cracks formed and widened in the carving c. cracks formed and widened in the rock d. all of the provided answers 14. in scene 2, what was the result of water as a weathering agent? a. rocks broke down and formed a talus slope b. cracks formed and widened in the carving c. cracks formed and widened in the rock d. the weak acid water solution has dissolved some of the facial features of the carving. 15. in scene 3, what was the result of vegetation as a weathering agent? a. the trees have been torn down by the ice and snow b. the trees and their roots have grown, causing fractures in the rocks c. the vegetation has grown, using up all of the soil in the area d. the vegetation has grown, helping to add more carbon dioxide to the air. 16. in scene 3, what was the result of repeated freezing and thawing? a. ice wedging has occurred as water freezes and expands in cracks in the rocks. b. freezing glues the rock fragments together. c. the trees die and become petrified due to being frozen. d. rocks become more hard and resistant due to freezing. 17. in scene 4, what was the result of vegetation as a weathering agent? a. the growing tree has provided shade for the house, preventing all weathering b. the growing tree has prevented rain from affecting the bike. c. the growing tree and its roots have caused cracks in the house and sidewalk. d. the growing roots have taken over the bicycle 18. in scene 4, what was the result of oxidation? a. the chimney was weakened and fell down. b. the windows became brittle and broke. c. the sidewalk was cracked. d. the bicycle rusted. 19. which scenes that you observed show examples of mechanical weathering? a. 1, 2, 3, 4 b. 2, 3, 4 c. 1, 2, 4 d. 3 and 4 20. which scenes that you observed show examples of chemical weathering? a. 1, 2, 3, 4 b. 2, 3, 4 c. 1, 2, 4

Answers

Answer:

Reaction

Explanation:

because it changes reaction during weathering

The correct answers for the all the 20 questions can be represented by the given answers.

The correct answer is A) mechanical.The correct answer is B) chemical.The correct answer is C) they both expand cracks in rock, causing rock to break apart.The correct answer is A) they would cause mechanical weathering as they dig into the rock and soil, breaking it into smaller pieces of the same material.The correct answer is A) they would oxidize.The correct answer is C) expands.The correct answer is D) carbonic acid.The correct answer is C) limestone.The correct answer is A) iron-rich minerals in those layers have oxidized.The correct answer is B) chemical; mechanical.The correct answer is B) the cave grew larger and stalactites and stalagmites formed.The correct answer is A) the sandstone was oxidized, staining the sandstone red.The correct answer is D) all of the provided answers.The correct answer is D) the weak acid water solution has dissolved some of the facial features of the carving.The correct answer is B) the trees and their roots have grown, causing fractures in the rocks.The correct answer is A) ice wedging has occurred as water freezes and expands in cracks in the rocks.The correct answer is C) the growing tree and its roots have caused cracks in the house and sidewalk.The correct answer is D) the bicycle rusted.The correct answer is D) 3 and 4.The correct answer is A) 1, 2, 3, 4.

Weathering refers to the process by which rocks and other geological materials on the Earth's surface are broken down and altered over time due to various natural forces. These forces include physical, chemical, and biological processes that act on rocks and minerals, leading to their disintegration and transformation into smaller particles and new substances.

Weathering is a fundamental part of the rock cycle and plays a crucial role in shaping the Earth's landscape over geologic time. It helps to break down rocks into sediments that can be transported and deposited by erosion, ultimately leading to the formation of new rocks through processes like sedimentation, compaction, and cementation. Weathering also contributes to the formation of soil, which supports plant growth and sustains terrestrial ecosystems.

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