And I was wondering if anyone might be able to tell me what I can expect. 

Granted, I could look it up somewhere, but this seems easier.

Is it just basic math, reading, and writing?

You're taking the ACT and you have not prepared. Don't even know the topic? I expect: for you to fail.

The ACT® test assesses high school students' general educational development and their ability to complete college-level work.

* The multiple-choice tests cover four skill areas: English, mathematics, reading, and science.
* The Writing Test, which is optional, measures skill in planning and writing a short essay.

From my experience pretty easy but then again I'm pretty smart. Easier than the SAT if you have taken that.

Oh dear...
Well, in any event, I've already been through two years of college, so if this is more of a high school level assessment, perhaps I'll be fine. I usually do quite well on these assessment tests.