General Science Mcqs for PPSC, FPSC, NTS
A. Absorption and re-emission of visible light by the atmosphere
A. When the air temperature is highest
A. A gas
A. the greenhouse effect to lessen
A. Accumulation of salts in water
A. Selection
A. 4.51 billion years
A. 4.14 billion years
A. 16.5 billion years
A. Messier 81
A. 160 million km
A. Sedimentary rocks
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