The heat we enjoy on a sunny day is due mainly to the Sun's A) ...

[viki]

The heat we enjoy on a sunny day is due mainly to the Sun's
 
  A) high surface temperature.
  B) relatively close distance.
  C) enormous size.
  D) none of the above

Question 2

Every equation in physics reminds us of a lesson: we can never change only one thing. When we change the composition of the atmosphere we likely also change
 
  A) its transparency.
  B) its reflectivity.
  C) its average temperature.
  D) Earth's climate.
  E) all of the above

[meganlapinski]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: E