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.
Give a brief note on mining.
Q 2.
What are population pyramids? How do they help in understanding about the population of a country?
Q 3.
What are the four Characteristics of resources?
Q 4.
Name the fibre crops and name the climatic conditions required for their growth.
Q 5.
Write a brief note on terrace farming and intercropping.
Q 6.
Mention some methods that are used to conserve soil
Q 7.
Differentiate between Ubiquitous and localised resources?
Q 8.
What is plantation agriculture?
Q 9.
Discuss the role of any two factors influencing population change.
Q 10.
Mention the different types of resources.
Q 11.
The world population has grown very rapidly. Why?
Q 12.
Rows of trees planted in the coastal areas to check the wind movement is called intercropping ?
Q 13.
What are the different characteristics of population composition?
Q 14.
Name any two steps that government has taken to conserve plants and animals.
Q 15.
What is meant by the term industry?
Q 16.
Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid Regions?
Q 17.
What is shifting cultivation? What are its disadvantages?
Q 18.
Distinguish between Metallic and non metallic minerals
Q 19.
What is mixed cropping or mixed farming?
Q 20.
How can one increase agricultural production?
Q 21.
What is a water-cycle?
Q 22.
What are the causes for the destruction of natural vegetation and wildlife?
Q 23.
What is sustainable development?
Q 24.
Why are human resources important?
Q 25.
Different crops are grown in different regions.
Q 26.
Name any three common minerals used by you every day.
Q 27.
Name the factors influencing agriculture?
Q 28.
Write any two reasons for land degradation today?
Q 29.
What are the similarities between information technology industries in Bangalore and California?
Q 30.
Distinguish between Conventional and non conventional sources of energy
Q 31.
Resources have value- discuss ?
Q 32.
What are abiotic resources?
Q 33.
What are the activities under the secondary sector?
Q 34.
How was the word agriculture, coined?
Q 35.
What are the classifications of minerals?
Q 36.
What do the 3Rs stand for in context with conservation of natural resources?
Q 37.
Sixty per cent of the world's people stay in just 10 countries. Name the countries with the percentage of world population.
Q 38.
What is the average density of population in India?
Q 39.
Suggest three ways to conserve water.
Q 40.
Which are the main factors which influence the location of an industry?
Q 41.
Quarrying can become a major environmental concern.
Q 42.
What is a resource?
Q 43.
What can we do to conserve resources?
Q 44.
What are the different kinds of cultivation?
Q 45.
Write a brief note on Intensive subsistence farming.
Q 46.
What is Nomadic herding?
Q 47.
What is the difference between Subsistence farming and Commercial farming?
Q 48.
What are the advantages in mixed cropping?
Q 49.
What is wind power?
Q 50.
What are the factors that determine the pattern in which a particular region is used?
