Direction: In the below question, the 1st and the 6th sentence of a passage are given while the other four sentences are split into four parts and named P, Q, R & S. These four parts are not given in their proper order. Read the sentence/passage and find out which of the four sequence is correct.
S1. Alien dust carried and deposited on the glacier surfaces by winds absorb more solar radiation owing to their darker colour.
P. Beyond this, the mineral dust also forms the basis of nutrition in the ecosystem.
Q. This drops to 20 per cent when the surface is deposited with this alien dust.
R. Ice and snow cover on glaciers typically reflect about 60 per cent of solar radiation.
S. The higher absorption of solar radiation results in the melting of water around the dust and the formation of the circular or ovular pockets.
S6. This can support a host of invertebrate life, and mircrobes are at the top of the foodchain, which is seldom seen outside glaciers.
Explanation:
S1 talks about discovery of alien dust and how it changes the impact of solar radiation. Out of all options, R and S seem a potential match. However, if we choose S as the next statement, R and Q do not fit in anywhere. Hence, we put Q as the statement after S1.
Connectors:
R and Q:
R. Ice and snow cover on glaciers typically reflect about 60 per cent of solar radiation.
Q. This drops to 20 per cent when the surface is deposited with this alien dust.
Q and S:
Q. This drops to 20 per cent when the surface is deposited with this alien dust.
S. The higher absorption of solar radiation results in the melting of water around the dust and the formation of the circular or ovular pockets.
S and P:
S. The higher absorption of solar radiation results in the melting of water around the dust and the formation of the circular or ovular pockets.
P. Beyond this, the mineral dust also forms the basis of nutrition in the ecosystem.
P also fits in with S6.
Hence, option D is correct.
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By: Brijesh Kumar