The following are resources you can use to learn more about civil, mechanical, materials, and industrial engineering.
Sloan Career Cornerstone Center - Civil Engineering: http://www.careercornerstone.org/civileng/civileng.htm
Sloan Career Cornerstone Center - Mechanical Engineering http://www.careercornerstone.org/mecheng/mecheng.htm
Sloan Career Cornerstone Center - Materials Science and Engineering http://www.careercornerstone.org/matscieng/matscieng.htm
Sloan Career Cornerstone Center - Industrial Engineering http://www.careercornerstone.org/industrial/industrial.htm
USC VSOE Pre-College Summer Engineering Blog http://summerengineering.wordpress.com/
Exploring Engineering: An Introduction for Freshman to Engineering and to the Design Process by P.G. Kosky, G. Wise, R. T. Balmer, and W. D. Keat
Engineering Your Future: A Comprehensive Introduction to Engineering by William C. Oakes, Les L. Leone, and Craif J. Gunn