Land Soil, Water, Natural Vegetation and Wildlife Resource class 8th

Chapter 2 - Land Soil, Water, Natural

Vegetation and Wildlife Resource

1. Answer the following questions:

(i). Which are the two main climatic factors responsible for soil formation?

Ans. Temperature and rainfall are the two main climatic factors responsible for soil formation.

 

(ii) Write any two reasons for land degradation today.

Ans. Deforestation and the indiscriminate use of chemical pesticides and fertilizers in agricultural lands are wo factors contributing to land degradation.

 

(iii). Why is land considered important resource?

Ans. Land is among the most important natural resources. It provides habitation to a wide-variety of flora and fauna. Human beings use land for various purposes such as agriculture, forestry, mining, building houses and roads, and setting up industries.

 

(iv). Name any two steps that government has taken to conserve plants and animals?

Ans. Two steps that the government has taken to conserve plants and animals are 

 

(a) Has set up national parks, wildlife sanctuaries and biosphere reserves for protecting natural vegetation and wildlife; for example, the Kaziranga National Park in Assam.

 

(b) Has banned the killing of lions, tigers, deer, great Indian bustards and peacocks. It has also prohibited the trade of the species of plants and animals protected under the international agreement CITES

 

(v) Suggest three ways to conserve water.

 

Ans. Three ways to conserve water:

(a) Rain-water harvesting.

(b) Reducing wastage of water.

(c) Replenishing ground water by promoting afforestation

 

2. Tick the correct answer:

 

i). Which one of the following is not a factor of soil formation?

Ans. (b). Soil texture

 

(ii). Which one of the following method is most appropriate to check soil erosion on steep slopes?

Ans. (c) Terrace cultivation

 

(iii). Which one of the followings not in favour of the conservation of the nature:

Ans. (c) Dispose poly packs after shopping

 

 

3. Match the following:

 

 

Ans.

 

 

Land use	Productive use of land
Humus	Organic matter deposited on top soil
Rock dams	Prevent soil erosion
Arable land	Land suitable for agriculture
Barrier	Contour ploughing

 

 

 

2. State whether the given statements are true or false. If true, write the reasons.

 

Ans.

(i) This statement is true. Plains and river valleys offer suitable land for agriculture. Hence, these are densely-populated areas of the world.

 

(ii). This statement is true, Though water is present in abundance, fresh water is a scarce resource, Water availability is a serious problem in many regions of the world. Due to the wastage of water, deforestation, and the pollution and depletion of fresh water reserves (such as rivers and ground water), the availability of water is fast declining

 

(iii). This statement is false. The described process is celled shelter belts. Intercropping is the process in which different crops are grown in alternate rows, and are sown at different times to protect the soil from rain wash.

 

(iv). This statement is false. Human interference's and climatic changes for the most part adversely affect the balance of the ecosystem.