Why are mirages generally associated with either very hot surface ...

[fox]

Why are mirages generally associated with either very hot surface temperatures or very cold surface temperatures?
 
  What will be an ideal response?

Question 2

Air pressure at 5500 m (18,000 ft.) is ________ percent of that at sea level.
 
  A) 0 B) 10 C) 30 D) 50 E) 75

[juwms]

Answer to Question 1

Mirages occur when there are very rapid changes of air density with height and these require large temperature variations. The most likely situation for this is with very hot or cold temperatures at the surface.

Answer to Question 2

D

[fox]

Great answer, keep it coming

Thanks for the timely response, appreciate it