Heat Islands

1) What are "heat islands"?

a) Islands of pacific ocean where marine temperature is 1-3 degree Celsius warmer.
b) Built up areas in the city that are hotter than nearby rural areas.
c) Zones in earth atmosphere where the ozone layer is thinnest.
d) Terrestrial areas where land temperature exceeds 40 degree Celsius.

2) Which of the following statements is incorrect with respect to heat islands?

a) Temperature of heat island in a city can be 1-3 degree Celsius warmer than its surroundings.
b) Temperature difference with respect to surroundings in evening can be much higher.
c) Both a and b
d) Neither a nor b

3) Which of the following is/are the sources of heat that result in creation of urban heat islands in the cities?

i) Vehicular emission
ii) Heat trapped in pavements and concrete surfaces.
iii) Heat absorbed by multi storey buildings.
iv) Use of air-conditioners.

a) i, ii and iii only
b) i and ii only
c) i and iv only
d) i, ii , iii and iv

4) What are the heat islands? Analyze the role played by rapid urbanization in creation of heat islands in million plus cities. What measures can be taken to minimize the effect of heat islands?

Answers

1) b
2) d
3) d
4) Check the reference material

Reference : The Indian Express