What do sunspots tell us about the Sun's rotation rate? What ...

[anshika]

What do sunspots tell us about the Sun's rotation rate?
 
  What will be an ideal response?

Question 2

Which two processes can generate energy to help a star or gas cloud maintain its internal thermal pressure?
 
  A) nuclear fusion and nuclear fission
  B) nuclear fusion and supernovae
  C) nuclear fission and supernovae
  D) nuclear fusion and gravitational contraction

[isabelt_18]

Answer to Question 1

Watching and timing sunspots as they travel across the Sun's face allows us to measure the rotation rate and determine it does not rotate as a solid body. It experiences differential rotation with different rates near the poles and equator.

Answer to Question 2

D

[anshika]

Excellent

[bulacsom]

Gracias!