Science, asked by gauravdheer40, 10 months ago

1.State the meaning of the term 'soil.
2.List the four main agents of physical weathering.
3.Write one difference between sand, clay and silt.
4.Name the types of soil classified on the basis of soil texture.
5.Give the meaning of the term 'Cohesion
6.List any three causes of soil pollution.

Answers

Answered by XxJAHANGIRxX

Answer:

1) Soil can be defined as the organic and inorganic materials on the surface of the earth that provide the medium for plant growth. ... As rocks are broken down, they mix with organic materials, which are those materials that originate from living organisms.

2)Physical weathering, also known as mechanical weather, is the process of rocks and minerals on Earth's surface breaking down or dissolving as a result of water, ice, salt, plants, animals or changes in temperature.

3)Clay has super fine particles that cling together and prohibit water and nutrient movement, while sand has course particles which allow water and nutrients to leach too rapidly. There actually is one more classification called silt which has particles sized between clay and sand.

4)Soil can be classified into three primary types based on its texture – sand, silt and clay.

5)Cohesion means sticking together. ... Cohesion is a word that comes to us through physics, where cohesion describes particles that are the same and tend to stick together — water molecules, for example. Outside of physics, cohesion describes unity among parts, and is something to be sought after.

6)Soil pollution is mostly caused by mindless human activities such as:

Industrial waste. ...

Deforestation. ...

Excessive use of fertilisers and pesticides. ...

Garbage pollution. ...

Climate change. ...

Loss of soil fertility. ...

Impact on human health. ...

Reforestation.

Explanation:

Answered by hamikamal2008

Answer:

Soil is the organic and inorganic material on the surface of the earth that provides the medium for plant growth. A soil profile is a vertical section of soil that ranges from the surface to the underlying rock. ... One type of soil is sand, which is small particles of weathered rock.

2)Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. Once a rock has been broken down, a process called erosion transports the bits of rock and mineral away.

3)Clay has super fine particles that cling together and prohibit water and nutrient movement, while sand has course particles which allow water and nutrients to leach too rapidly. ... Silt is a sediment material with an intermediate size between sand and clay.

4)Soil can be classified into three primary types based on its texture – sand, silt and clay. However, the percentage of these can vary, resulting in more compound types of soil such as loamy sand, sandy clay, silty clay, etc.

5)The twelve classifications are sand, loamy sand, sandy loam, loam, silt loam, silt, sandy clay loam, clay loam, silty clay loam, sandy clay, silty clay, and clay. Soil textures are classified by the fractions of each soil separate (sand, silt, and clay) present in a soil.

Causes of Soil Contamination