NCERT Class 9 EVS Water supply and waste water disposal

3. Water supply and waste-water disposal systems prevalent in the past Background There are many forts, palaces and monuments of historical importance. Detailed information of famous monuments is available on the period when these were constructed, who constructed them and the…

NCERT Class 9 EVS Use and abuse of water bodies

  11. Use and abuse of water bodies Background Quality and quantity of water flowing through a river determine its sustainable usefulness or value as a resource. Due to several human activities, for example, agricultural run off, industrial effluents and domestic discharges,…

NCERT Class 9 EVS Save endangered species

  18. Save endangered species Background All the living organisms, be it plants, animals or microorganisms, have a specific role to play in the ecosystem in which they exist. Some of these organisms face the risk of becoming extinct because of decreasing numbers that are…

NCERT Class 9 EVS Responsible tourism

  15. Responsible tourism Background Tourism is beneficial to both the tourists and the people associated with the trade. Tourists undertake travel for recreation, aesthetic satisfaction, appreciation of beauty, culture and for religious purposes. Health tourism and adventure…

NCERT Class 9 EVS Reducing farmers woes alternate cropping

2. Reducing farmer’s woes: alternate cropping Background Increasing demand for food due to everrising population has created a pressure on agriculture for more production. Excessive use of fertilisers and water for increasing production may be counterproductive for sustainable…

NCERT Class 9 EVS Rainwater harvesting

  19. Rainwater harvesting Background There cannot be life without water. Rain and snowfall are the two sources of fresh water which replenish underground water, lakes, rivers, and other water bodies. But a lot of rainwater also goes waste. Water being a scarce resource, and…

NCERT Class 9 EVS Quality of water

  17. Quality of water Background The drinking water that we get is contaminated with various dissolved substances such as calcium, iron, aluminium salts, etc. which often cross the permissible limits. The water in extreme cases may receive effluents from factories,  small…

NCERT Class 9 EVS Precipitation and soil erosion in the

  4. Precipitation and soil erosion in the mountain ecosystem Background soil erosion. There are many natural and manmade factors which are responsible for soil erosion. Precipitation – rainfall and snow-fall – is one of the prime factors for such erosion. Soil as a resource…

NCERT Class 9 EVS Physiographic division of India

  10. Physiographic division of India and the lifestyles of people Background Physical features of land are diverse like mountains, plains, deserts and coastal areas. These physical features do have an impact on the lifestyle of people inhabiting them. Trade, agriculture, …

NCERT Class 9 EVS People as resource

8. People as resource Background Expenditure on education and health of the people is a good investment. Investment in human capital yields a return similar to investment in monetary capital. The society gains directly and indirectly in terms of the standards of skilled…

NCERT Class 9 EVS Our household service providers

5. Our household service providers Background All of us know about the various basic service providers and helping hands without whom our lives would be very difficult. The mechanic who fixes electrical appliances, water lines; the mason who constructs houses for living; the…

NCERT Class 9 EVS Modern agriculture and its impact

9. Modern agriculture and its impact on environment Background With the advent of technological advancements in agriculture such as better irrigation systems, use of high yielding seeds, fertilisers, pesticides, multiple cropping system, etc. farmers are getting better yields…

NCERT Class 9 EVS Locally available medicinal plants

1. Locally available medicinal plants Background Vegetation consists of different types of trees, shrubs and herbs. Many of these plants have medicinal qualities and are used to treat different types of diseases. We may find some such plants in our locality or neighbourhood.…

NCERT Class 9 EVS Life in a village

6. Life in a village Background Most of the people in the rural areas are engaged in primary activities such as farming, keeping livestock, fishing or other related small scale and cottage industries. A large number of people may also be landless farm labourers, daily wagers…

NCERT Class 9 EVS Kitchen garden

16. Kitchen garden Background Many houses/homes have ample free space. As a hobby people tend to make use of this freely available space for kitchen gardens. Kitchen gardens have a variety of seasonal vegetables which can, to some extent, meet the requirements of the family …