Natural Sciences CLEP - vs Algebra CLEP

[K&B]

I have zero science knowledge and zero math knowledge, but I need 6 credits to finish my AA at TESC. The Natural Sciences is 6 credits. If I pass I would be done as I need 3 credits in Science. The Algebra is 3 credits, and I would have to find another CLEP to finish for my AA. I struggled with the Liberal Arts Math (course, not CLEP) and did pass. Can anyone tell me how difficult either test is and how much studying I would need to do to pass given I don't know anything about either subject? If there is a list somewhere if someone could point me there. I tried searching Natural Science and it came back with nothing.
Thanks.