The Ascent of Science by Brian L. Silver (Score 2, Informative)

ISBN: 0-19-513427-3, 1998, Oxford University Press. This is a concise and readable summary of the history, philosophy and theories of science. I had a bit more science and math education than you claim, but it was a long time ago. This book really helped me to appreciate the accomplishments of those who contributed to the scientific endeavor. It won't teach you the particulars of any one of the sciences, but it will help you to put them all into a context for further study.