Q3 D of 33 Page 77

Answer the following in brief:

What is Green House effect?


Green House effect refers to the trapping of the Sun’s warmth in a planet’s atmosphere. The gases like CO2, SO2, trap the heat from the sun and don’t allow the planet’s heath to escape thereby increasing the temperature of the planet. It causes Climatic change, Ozone layer depletion and melting of the ice.


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3

Answer the following in brief:

What is ‘black death’?


 3 C

Answer the following in brief:

Where do we have high and low densities of population?


 3 E

Answer the following in brief:

Write down two ways of how the locals and the government restored Palk Bay.


 3 F

Answer the following in brief:

Define:


i. Population growth


ii. Infant Mortality Rate


iii. Census


iv. Sustainable Development