Question:
What is biogas?
Answer:
Organic waste such as dead plant and animal material, animal dung and kitchen waste can be converted into a gaseous fuel called biogas. Biogas is essentially a mixture of methane and carbon dioxide. The organic waste is decomposed by bacteria in biogas digesters to emit biogas. Biogas is an excellent fuel for cooking and lighting. Biogas plants produce huge amounts of valuable organic manure each year.
Resources
Q 1.
What are the four Characteristics of resources?
Q 2.
Give a brief note on mining.
Q 3.
Name the fibre crops and name the climatic conditions required for their growth.
Q 4.
Write a brief note on terrace farming and intercropping.
Q 5.
What are population pyramids? How do they help in understanding about the population of a country?
Q 6.
Mention some methods that are used to conserve soil
Q 7.
Rows of trees planted in the coastal areas to check the wind movement is called intercropping ?
Q 8.
Mention the different types of resources.
Q 9.
What are the different characteristics of population composition?
Q 10.
Differentiate between Ubiquitous and localised resources?
Q 11.
What is plantation agriculture?
Q 12.
Name any two steps that government has taken to conserve plants and animals.
Q 13.
The world population has grown very rapidly. Why?
Q 14.
Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid Regions?
Q 15.
What is mixed cropping or mixed farming?
Q 16.
Name any three common minerals used by you every day.
Q 17.
What is the average density of population in India?
Q 18.
What is sustainable development?
Q 19.
Name the factors influencing agriculture?
Q 20.
What are natural resources?
Q 21.
What is a water-cycle?
Q 22.
What are the causes for the destruction of natural vegetation and wildlife?
Q 23.
Different crops are grown in different regions.
Q 24.
Discuss the role of any two factors influencing population change.
Q 25.
Write any two reasons for land degradation today?
Q 26.
What is meant by the term industry?
Q 27.
Resources have value- discuss ?
Q 28.
What is the difference between Subsistence farming and Commercial farming?
Q 29.
What are the advantages in mixed cropping?
Q 30.
How can one increase agricultural production?
Q 31.
Write a brief note on the Ministry of Human Resource Development in India.
Q 32.
What is shifting cultivation? What are its disadvantages?
Q 33.
Distinguish between Metallic and non metallic minerals
Q 34.
Write a brief note on wind power ?
Q 35.
What are abiotic resources?
Q 36.
What is Nomadic herding?
Q 37.
Write a note on Munna Lai and his farm land.
Q 38.
What are the classifications of minerals?
Q 39.
What is wind power?
Q 40.
Give a brief description of soil composition or the layers of soil ?
Q 41.
Why are human resources important?
Q 42.
Give reason for Petroleum is referred to as black gold.
Q 43.
What can we do to conserve resources?
Q 44.
What are the different kinds of cultivation?
Q 45.
How is farming classified?
Q 46.
Write a brief note on Intensive subsistence farming.
Q 47.
What are the 3 categories of Commercial farming?
Q 48.
How are mineral extracted from earth?
Q 49.
Name the different rocks that minerals occur in?
Q 50.
How does land fulfil our needs?
