Question

Which of the following changes would be likely to make terrestrial life on this planet impossible [CPMT 1989]
A) A decrease in mean temperature by 10{}^\circ C
B) Change in atmosphere permitting all the solar radiation reaching the upper atmosphere to penetrate to the surface of the earth
C) Change in the orbit of the earth from an ellipse to a circle
D) Disappearance of the moon

Answer 1

Which of the following changes would be likely to make terrestrial life on this planet impossible Change in atmosphere permitting all the solar radiation reaching the upper atmosphere to penetrate to the surface of the earth