Question:
What is Hydel power?
Answer:
When power is generated from the force of moving water it is called Hydel power. Rain water or river water is stored in dams and made to fall from heights. The falling water flows through pipes inside the dam over turbine blades placed at the bottom of the dam. The moving blades then turn the generator to produce electricity.
The water discharged after the generation of electricity is used for irrigation. One fourth of the world’s electricity is produced by Hydel power.
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.
Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid Regions?
Q 5.
Distinguish between Biogas and natural gas
Q 6.
Write a brief note on wind power ?
Q 8.
What is meant by the term industry?
Q 9.
What are the two main classifications of power resources?
Q 10.
Why people are considered a resource?
Q 11.
What is Nomadic herding?
Q 12.
Which industry is often referred to as the backbone of modem industry and why?
Q 13.
Mention a few minerals and their uses.
Q 14.
In India agriculture is a primary activity.
Q 15.
Name any three common minerals used by you every day.
Q 16.
Name the 3 sectors of activities done by people.
Q 17.
Write a brief note on the Ministry of Human Resource Development in India.
Q 18.
Human interference and changes of climate can maintain the ecosystem ?
Q 19.
Differentiate between emigrants and immigrants.
Q 20.
Different crops are grown in different regions.
Q 21.
Write a brief note on Renewable resources ?
Q 22.
How are mineral extracted from earth?
Q 23.
What are the factors that determine the pattern in which a particular region is used?
Q 24.
Give a brief description of soil composition or the layers of soil ?
Q 25.
What are bio reserves?
Q 26.
The world population has grown very rapidly. Why?
Q 27.
Distinguish between Ferrous and nonferrous minerals
Q 28.
Write a brief note on salt.
Q 29.
What are natural resources?
Q 30.
Why is population study essential?
Q 31.
Why are resources distributed unequally over the earth?
Q 32.
What is agriculture?
Q 33.
Give Reason for Environmental aspects must be carefully looked into before building huge dams.
Q 34.
Distinguish between Conventional and non conventional sources of energy
Q 35.
How does land fulfil our needs?
Q 36.
What is the average density of population in India?
Q 37.
Why is population growth slowing in united Kingdoms?
Q 38.
Differentiate between Ubiquitous and localised resources?
Q 39.
Discuss the role of any two factors influencing population change.
Q 40.
Name any two steps that government has taken to conserve plants and animals.
Q 41.
Rows of trees planted in the coastal areas to check the wind movement is called intercropping ?
Q 42.
How was the word agriculture, coined?
Q 43.
How is farming classified?
Q 44.
What is mixed cropping or mixed farming?
Q 45.
How can one increase agricultural production?
Q 46.
Give a brief note on mining.
Q 47.
What do the 3Rs stand for in context with conservation of natural resources?
Q 48.
Name a few landforms.
Q 49.
Mention some methods that are used to conserve soil
Q 50.
Write a brief note on terrace farming and intercropping.
