Question

49) Regarding sea level, melting ice and global climate, which are true? Melting sea ice can increase the albedo of the earth, causing a net cooling. a) Global sea level has been more or less stable for the last 6,000 years, but has been rising b) in recent times. c) Sea level rise is mostly due to the thermal expansion of water as it is heated. d) Choices A and B are true. e) Choices B and C are true. 30) Impact- population x (affluence or consumption) x technology means that countries with larger populations will have a larger impact on the planet. a) True b) False 28) The energy to run farm equipment is high, so it is best to apply the annual requirement of fertilizer once in the spring, before spring rains, rather than applying lesser amounts throughout the season. A)This is true. B) This is false.

Answer 1

49) e- the correct option

Option A cant be correct as the rise in albedo, less rays is being reflected back and so we cannot get a net cooling effect.

Choices B and C are true.

In the recent times it has been confirmed by the scientists that not only due to melting of sea ices the rise in sea level has occurred but also due to thermal expansion of water because as the sea water gets heated and becomes less dense it then takes more volume then before thus increases the sea level.

30) a-True

As the economic or mathematical formula describes I=P*A*T

Where P, A and T signifies population, affluence and technology respectively

28)false