Which class would be better(easier) to take Earth Science or Astronomy?

2 answers

I think that's a matter of interest and your previous history. Personally, I would choose earth science.
I agree that it is a matter of interest, as well as the likelihood that you will be employed in or affected by either field. The subject that you find more interesting might seem easier. Biology would be another option.

Where I went to college, the liberal arts majors who wanted to fulfill their science requirement with minimum effort chose astronomy. A recent president nearly flunked that course.

I also chose astronomy as an elective science. It was my favorite course.