For information about rocks & minerals check out these sites!

http://www.mnh.si.edu/earth/main_frames.html

http://www.esiponline.org/books/tech/rocks.html

Weathering & Erosion Review:
Scholastics Study Jams: https://www.youtube.com/watch?v=XteN4hRrbJM
It's a Hard Rock Life: https://www.youtube.com/watch?v=qGZa1n-9e6o