Watch the introduction video about Rocks and Minerals. Blog 2 questions about Rocks and Minerals. One questions should be able to be answered from the video. The other questions needs to be a question that would require a bit more research to answer.
http://www.sciencekids.co.nz/videos/chemistry/mineralchemistry.html
http://www.sciencekids.co.nz/videos/chemistry/mineralchemistry.html