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 population pyramids? How do they help in understanding about the population of a country?
Q 2.
Which are the two main climatic factors responsible for soil formation?
Q 3.
Write a brief note on Intensive subsistence farming.
Q 4.
Different crops are grown in different regions.
Q 5.
Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid Regions?
Q 6.
Write a brief note on wind power ?
Q 7.
What is Nomadic herding?
Q 9.
What are the two main classifications of power resources?
Q 10.
In India agriculture is a primary activity.
Q 11.
Why people are considered a resource?
Q 12.
What is meant by the term industry?
Q 13.
Distinguish between Biogas and natural gas
Q 14.
Distinguish between Ferrous and nonferrous minerals
Q 15.
What are the factors that determine the pattern in which a particular region is used?
Q 16.
Write a brief note on the Ministry of Human Resource Development in India.
Q 17.
Name a few landforms.
Q 18.
What is the average density of population in India?
Q 19.
Differentiate between emigrants and immigrants.
Q 20.
Rows of trees planted in the coastal areas to check the wind movement is called intercropping ?
Q 21.
Name the 3 sectors of activities done by people.
Q 22.
How can one increase agricultural production?
Q 23.
Mention a few minerals and their uses.
Q 24.
Why is population growth slowing in united Kingdoms?
Q 25.
Human interference and changes of climate can maintain the ecosystem ?
Q 26.
Which are the main factors which influence the location of an industry?
Q 27.
Which industry is often referred to as the backbone of modem industry and why?
Q 28.
What are the similarities between information technology industries in Bangalore and California?
Q 29.
How are mineral extracted from earth?
Q 30.
Give a brief description of soil composition or the layers of soil ?
Q 31.
Distinguish between Conventional and non conventional sources of energy
Q 32.
Mention the different types of resources.
Q 33.
Write a brief note on Renewable resources ?
Q 34.
What is mixed cropping or mixed farming?
Q 35.
What are natural resources?
Q 36.
Why cotton textile industry rapidly expanded in Mumbai?
Q 37.
Distinguish between the followings
(i) Agro-based and mineral based industry.
Q 38.
Name any three common minerals used by you every day.
Q 39.
Write a brief note on salt.
Q 40.
How does land fulfil our needs?
Q 41.
What are bio reserves?
Q 42.
Why is population study essential?
Q 43.
Why are resources distributed unequally over the earth?
Q 44.
Give reason for Most industries are concentrated around coal mines.
Q 45.
What are the four Characteristics of resources?
Q 46.
Resources have value- discuss ?
Q 47.
What can we do to conserve resources?
Q 48.
How was the word agriculture, coined?
Q 49.
How is farming classified?
Q 50.
What is the difference between Subsistence farming and Commercial farming?
