i. What is the El Nino ?
ii. How does it affect the climate of India ?
i. It is a narrow warm current which sometimes appears off the cost of Peru in South America during December.
ii. Warming of tropical pacific waters affects the global pattern of pressure and wind system including the monsoon winds in the Indian Ocean.
i. Name two cities in India which have grown rapidly due to in -migration.
ii. What are the two factors that led to the decreasing growth rate of population from 1981 to 2001 ?
Give a reason for each of the following :
i. Delhi has rain in December - January.
ii. Kolkata has a little rain in Apri.
The dependency ratio is higher in rural areas than in UIrban areas. Give two reasons to explain why.
i. What is meant by variability of rainfall ?
ii. How does this variability affect agriculture ?
Mention two different ways by which modern methods of irrigation are an improvement over the primitive methods.
