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.
What is a water-cycle?
Q 3.
What are the four Characteristics of resources?
Q 4.
What are natural resources?
Q 5.
Distinguish between Ferrous and nonferrous minerals
Q 6.
What is meant by arable land?
Q 7.
What are the classifications of minerals?
Q 8.
Differentiate between Ubiquitous and localised resources?
Q 9.
Resources have value- discuss ?
Q 10.
What is Nomadic herding?
Q 11.
What are the two main classifications of power resources?
Q 12.
Why are resources distributed unequally over the earth?
Q 13.
What are the advantages in mixed cropping?
Q 14.
Name any two steps that government has taken to conserve plants and animals.
Q 15.
Ganga-Brahmaputra plain of India is an overpopulated region.
Q 16.
What is meant by the term industry?
Q 17.
Distinguish between Conventional and non conventional sources of energy
Q 18.
Write a brief note on Intensive subsistence farming.
Q 20.
Write a brief note on the Ministry of Human Resource Development in India.
Q 21.
Name the 3 sectors of activities done by people.
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.
Mention some methods that are used to conserve soil
Q 25.
What is the average density of population in India?
Q 26.
Why is population growth slowing in united Kingdoms?
Q 27.
Mention the different types of resources.
Q 28.
What can we do to conserve resources?
Q 29.
What is mixed cropping or mixed farming?
Q 30.
Why is population study essential?
Q 31.
Name the fibre crops and name the climatic conditions required for their growth.
Q 32.
What is a resource?
Q 33.
What are abiotic resources?
Q 34.
What are the activities under the secondary sector?
Q 35.
What do the 3Rs stand for in context with conservation of natural resources?
Q 36.
Name a few landforms.
Q 37.
Differentiate between emigrants and immigrants.
Q 38.
What is resource conservation?
Q 39.
Why are human resources important?
Q 40.
The world population has grown very rapidly. Why?
Q 41.
What is an ore? Where are the ores of metallic minerals generally located?
Q 42.
Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid Regions?
Q 43.
Give reason for Most industries are concentrated around coal mines.
Q 44.
How was the word agriculture, coined?
Q 46.
Sixty per cent of the world's people stay in just 10 countries. Name the countries with the percentage of world population.
Q 47.
Complete the sentences below using some of the following words, sparsely, favourable, fallow, artificial, fertile, natural, extreme, densely
Q 48.
Suggest three ways to conserve water.
Q 49.
Why cotton textile industry rapidly expanded in Mumbai?
Q 50.
Name any three common minerals used by you every day.
