How can I study for a social studies test in two days?

This is entirely possible to do.  The strategy I would use is outlining.  When I was in law school, there was only one exam for each course, the final exam, and I had to study 16 weeks of material in a few days, for five courses a term.  If I could do this, you can, too!

The idea is to first make an outline of all the content you are expected to know. This might...

This is entirely possible to do.  The strategy I would use is outlining.  When I was in law school, there was only one exam for each course, the final exam, and I had to study 16 weeks of material in a few days, for five courses a term.  If I could do this, you can, too!

The idea is to first make an outline of all the content you are expected to know. This might include materials from your textbook, handouts you have been given, and notes from class lectures.  I don't know if this is a history, civics, or geography course, so it is difficult to tell you exactly how to organize the outline. If this is history, then I would organize by eras if possible. If this is a geography course, then organizing by continents and countries would work. For a civics course, perhaps organizing by government branches would be good.  Put the proper content in the appropriate categories. Don't worry about how long the outline turns out to be. Get in as much as you can. 

Now, let's suppose you have a ten-page outline when you are done. Your next task is to boil that down to about a five-page outline.  This is called distillation. In the act of boiling this down, believe it or not, you will retain most of what was in the longer outline. 

Finally, get those five pages down to one page. This is the paper you will go over at least a few times before your exam.  As you go over this paper, magically, you will remember what was in the ten-page outline. Each point that you have on that piece of paper represents a great deal more content, and in the act of distillation, you have been studying, whether you realize it or not. 

This worked for me for three years, and it is the absolute best method I know of to study.  However, if you do not get a good night's sleep and do not eat a good breakfast, your outline studying will not be as useful to you.  Set yourself up to succeed!