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Unformatted text preview: ................. .............................................................................. .............................................................................. .............................................................................. .............................................................................. .............................................................................. 221-154 [6] – 13 – M01/420/H(3) Option F – Fuels and energy F1. In a given location, the earth’s surface receives 1.26 ×106 units of solar energy. Green plants (e.g. algae) absorb 1.26 ×10 4 units of this energy. (a) (i) What percentage of the sun’s energy is absorbed by the green plants? [1] ..................................................................... (ii) Suggest two reasons why the remainder of the sun’s energy is not absorbed by green plants. [2] ..................................................................... ..........................................
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This note was uploaded on 05/02/2008 for the course CHEM 142,152,16 taught by Professor Unknown during the Spring '08 term at University of Washington.

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