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Tamas

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  1. Asked: May 12, 2021In: Class 9 Social Science

    Explain the following terms: (a) Coriolis force (b) Jet stream

    Tamas
    Added an answer on May 12, 2021 at 7:56 am

    (a) Coriolis force: Coriolis force is an apparent force caused by the earth's rotation The Coriolis force is responsible for deflecting winds towards the right in the northern hemisphere and towards the left in the southern hemisphere This is also known as ‘Ferrel’s Law’. (b) Jet stream: There are aRead more

    (a) Coriolis force: Coriolis force is an apparent force caused by the earth’s rotation The Coriolis force is responsible for deflecting winds towards the right in the northern hemisphere and towards the left in the southern hemisphere This is also known as ‘Ferrel’s Law’.
    (b) Jet stream: There are a narrow belt of high altitude above 12.000 westerly wind in the troposphere- Their speed varies from about 110 km/h in summer to about 154 km/h in Winter Number of separate streams have been identified The most constant are the multitude and the subtropical jet stream.

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  2. Asked: May 12, 2021In: Class 9 Social Science

    Why most of the world’s deserts are located in the western margins of continents in the subtropics?

    Tamas
    Added an answer on May 12, 2021 at 7:48 am

    In the tropics, moist air heated by the sun rises, sheds its moisture to give tropical mains. It then moves away from the equator. Where this dry air returns to the ground, it brings Almost no rain and produces deserts. Desert geography is controlled ultimately by precipitation physics. Sheer remoteRead more

    In the tropics, moist air heated by the sun rises, sheds its moisture to give tropical mains. It then moves away from the equator. Where this dry air returns to the ground, it brings Almost no rain and produces deserts. Desert geography is controlled ultimately by precipitation physics. Sheer remoteness from oceanic moisture source may be dominating factor for the location of deserts in the western margins of the continents in the subtropics.

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  3. Asked: May 12, 2021In: Class 9 Social Science

    Write a short note on precipitation in India.

    Tamas
    Added an answer on May 12, 2021 at 7:43 am

    Ans. There are variations in the form, types as well as amount and the seasonal distribution as given below: (a) Form: Precipitation is mostly in the form of snow-fall in the upper parts of Himalayas. It, however, rains over the rest of the country. (b) Variations in amount: The annual precipitationRead more

    Ans. There are variations in the form, types as well as amount and the seasonal distribution as given below:
    (a) Form: Precipitation is mostly in the form of snow-fall in the upper parts of Himalayas. It, however, rains over the rest of the country.
    (b) Variations in amount: The annual precipitation varies from over 400 cm in Meghalaya to less than 10 cm in Ladakh and western Rajasthan.
    (c) Difference in period : Most parts of the country receive rainfall from June to September. But some parts like the Tamil Nadu coast get most of its rain during October and November.
    (d) Less contrasts in coastal areas: In general, coastal areas experience less contrasts in temperature conditions. Seasonal contrasts are more in the interior of the country. There is decrease in rainfall generally from east to west in Northern plains.
    (e) Effects of precipitation: The variations in precipitation have given rise to variety in lives of people in terms of the food they eat, the clothes they wear and also the kind of houses they live in. For example, the houses in Rajasthan have thick walls and flat roofs while the houses in the Tarai region have sloping roofs.

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  4. Asked: April 11, 2021In: Class 10 Social Science

    What is the state of India’s environment as depicted by the village Sukhomajri and the district of Jhabua?

    Tamas
    Added an answer on April 11, 2021 at 9:30 am

    (i) The village of Sukhomajri and the district of Jhabua have shown that it is possible to reverse land degradation by plantation of trees. Tree density in Sukhomajri increased from 13 per hectare in 1976 to 1,279 per hectare in 1992. (ii) Regeneration of the environment has led to economic well-beiRead more

    (i) The village of Sukhomajri and the district of Jhabua have shown that it is possible to reverse land degradation by plantation of trees. Tree density in Sukhomajri increased from 13 per hectare in 1976 to 1,279 per hectare in 1992.
    (ii) Regeneration of the environment has led to economic well-being of the people. The annual average household income in Sukhomajri ranged from ` 10,000-15,000 between 1979 and 1984.This was due to greater resource availability, improved agriculture and animal care.
    (iii) Madhya Pradesh government has made people the decision makers because their participation is essential for ecological restoration. Thus, 2.9 million hectares or 1 per cent of India’s land area are being greened across the state through watershed management.

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  5. Asked: April 11, 2021In: Class 10 Social Science

    Describe measures of soil conservation.

    Tamas
    Added an answer on April 11, 2021 at 9:29 am

    The measures for soil conservation are as follows: (a) Contour ploughing i.e., ploughing along the contour lines decelerate the flow of water down the slopes. (b) Terrace cultivation: Steps are cut on the slopes making terraces which restrict erosion. It is done in western and central Himalayas. (c)Read more

    The measures for soil conservation are as follows:
    (a) Contour ploughing i.e., ploughing along the contour lines decelerate the flow of water down the slopes.
    (b) Terrace cultivation: Steps are cut on the slopes making terraces which restrict erosion. It is done in western and central Himalayas.
    (c) Strip cropping It divides large fields into strips. Strips of grass are left to grow between the crops.
    (d) Planting of trees to create shelters are called shelter belts. These shelter belts help in stabilising the desert in western India.

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