By what process does the Sun generate energy? A) nuclear ...

[savannahhooper]

By what process does the Sun generate energy?
 
  A) nuclear fusion
  B) chemical reactions
  C) nuclear fission
  D) gravitational contraction
  E) gradual expansion

Question 2

While Ganymede and Callisto are about the same size, the surface of Callisto is much younger, with considerable tectonic reformation.
 
  Indicate whether the statement is true or false

[Koolkid240]

Answer to Question 1

A

Answer to Question 2

FALSE

[savannahhooper]

Wow, this really help

[amandanbreshears]

Thanks for the timely response, appreciate it