Granulation is caused by (Multiple Choice)

Granulation is caused by
 
  a. sunspots.
  b. rising and sink gases below the photosphere.
  c. shock waves in the corona.
  d. the solar wind flowing away from the corona.
  e. the heating in the chromosphere.

Question 2

The ____________________ of a black hole in a binary system can emit X-rays and allow us to detect the presence of the black hole.
 
  Fill in the blank(s) with correct word

Question 3

The Doppler effect states that the motion of any object can
 
  a. shift the wavelength of spectral lines.
  b. change the speed of light emitted from the object.
  c. enhance the chemical composition of the object.
  d. make the object appear hotter.
  e. make the object appear cooler.

Question 4

A(n) ____________________ periodically emits large amounts of X-ray radiation as material accretes around a neutron star or black hole.
 
  Fill in the blank(s) with correct word