Question

Ch-2 Geo: -


Q-1 List four factors responsible for soil erosion.

Q-2 Suggest measures for land conservation.

Q-3 How do landslides prove dangerous?

Q-4 What are the National parks and Wildlife sanctuary?

Q-5 What is wind erosion?



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Answer 1

Q.1 ] The factors responsible for soil erosion are:

1. Wind
2. water
3. Overgrazing.
4. Deforestation.
5. Afforestation.
6. Crop Rotation.
7. Terrace Farming.
8. Building Dams.

Q.2] Measures for land conservation are:

1. Afforestation and proper management of grazing land.
2. Planting of shelter belts of plants.
3. Control on over grazing.
4. Stabilisation of sand dunes by growing thorny bushes.
5. Control on mining activities.
6. Proper discharge and disposal of industrial effluents and waste after treatment.

Q.3] Landslide dams can be extremely dangerous because they are usually highly unstable. As the water builds up behind the dam, the landslide becomes saturated with water and can break catastrophically, flooding all areas downstream with little or no warning.

Q.4] National Parks And Sanctuaries: “National Parks are the areas that are set by the government to conserve the natural environment.” “Sanctuary is a place of refuge where injured, abandoned and abused wildlife is allowed to live in peace in their natural environment without any human intervention.”

Q.5] Wind erosion is a common cause of land degradation in the arid and semi arid grazing lands of inland Queensland. It is one of the processes leading to desertification. Significant wind erosion occurs when strong winds blow over light-textured soils that have been heavily grazed during periods of drought.

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Answer 2

Answer:

ANS 1- Rain, rivers, floods, lakes, and the ocean carry away bits of soil and sand and slowly wash away the sediment. Rainfall produces four types of soil erosion: splash erosion, sheet erosion, rill erosion, and gully erosion.

ANS 2- Techniques for improved soil conservation include crop rotation, cover crops, conservation tillage and planted windbreaks, affect both erosion and fertility.

ANS 3- Landslide dams can be extremely dangerous because they are usually highly unstable. As the water builds up behind the dam, the landslide becomes saturated with water and can break catastrophically, flooding all areas downstream with little or no warning.

ANS 4-

• Wildlife sanctuary can be understood as the regions where wildlife and their habitat is protected from any disturbance.
• National park is the area of countryside, which is specifically designated for wildlife, where they can live freely and use the natural resources.

ANS 5- Wind erosion is a natural process that moves soil from one location to another by wind power. Wind erosion can be caused by a light wind that rolls soil particles along the surface through to a strong wind that lifts a large volume of soil particles into the air to create dust storms.