The lunar tidal bulge has a period of 12 hours and 25 minutes, ...

[hbsimmons88]

The lunar tidal bulge has a period of 12 hours and 25 minutes, but the solar tidal bulge period is 12 hours. Why the difference?
 
  a) The Moon is closer than the Sun
  b) The Moon has phases
  c) The Moon moves around Earth in its orbit
  d) The Sun is bigger than the Moon
  e) The Moon's orbit is at a bigger angle from the
  rotation axis

Question 2

Of all the human-caused gases, which gas makes the greatest relative contribution to increasing the greenhouse effect?
 
  a) hydrogen
  b) methane
  c) carbon dioxide
  d) oxygen
  e) ozone

[emsimon14]

Answer to Question 1

C

Answer to Question 2

C

[hbsimmons88]

Both answers were spot on, thank you once again

[emsimon14]

Great! Please up vote