1. By: James Hardy

2. My Mineral Research Question  What minerals make a CD or DVD? Why are these materials used?

3. A DVD A DVD is a compact disk used to store data, typically things that include:  Movies  Video Games  Any type of video.

4. A CD A CD is another type of compact disk, but instead of holding videos, video games, et cetera, but a CD holds:  Music  Any type of audio

5. Minerals used in both  Gold  Silver  Bauxite (or Aluminum)

6. Gold The data of a CD is read out onto the machine by scanning the spiral track using a laser. Which is why gold is used in both a CD and a disk because the mineral is a great reflector of light and infrared heat.

7. Silver After the data of a CD/disk is read, the data converts in high frequency signals. Silver is used in CDs/disks because silver is a great electrical conductor, which can convert data into high frequencies.

8. Bauxite (Aluminum) Bauxite (Aluminum) is also a great electrical conductor, so Aluminum can also convert data into high frequencies.

9. Sources  "The Life Cycle of a CD or DVD." (2003): 1-2. Web. 29 Mar. 2015.  "CD Player." Wikipedia. Wikimedia Foundation, n.d. Web. 30 Mar. 2015.  "Aluminum." Aluminum. N.p., n.d. Web. 30 Mar. 2015.  "Gold." Wikipedia. Wikimedia Foundation, n.d. Web. 30 Mar. 2015.  "Infrared Light." Wikipedia. Wikimedia Foundation, n.d. Web. 30 Mar. 2015.