1. The CD ROM True or False (Starter)

2. The CD ROM True or False A CD ROM disk stores it’s data on a track in a spiral formation. If you were to unravel this track and put it in a straight line, it would be 0.5 microns wide and 3.5 miles in length. True 1 1 http://electronics.howstuffworks.com/cd3.htm

3. The CD ROM True or False A CD ROM disk rotates at more than 23,000rpm when data is being read from it, though writing speeds are not as fast. False 2 2 A CD ROM rotates at around 200-500rpm. A CD ROM disk rotating at this speed would explode and break up. http://electronics.howstuffworks.com/cd4.htm

4. The CD ROM True or False Is this description of the working of a CD ROM true: ‘The laser beam passes through the polycarbonate layer, reflects off the aluminum layer and hits an opto-electronic device that detects changes in light.’ 3 3 http://electronics.howstuffworks.com/cd5.htm True

5. The CD ROM True or False The maximum capacity of a CD is 400MB 4 4 False Commonly CDs store up to 700MB of data

6. The CD ROM True or False If you spill a coffee over a CD, will it ruin the data? 5 5 False Not usually, you will normally be able to wipe it off. http://www.factscolumn.com/interesting-facts-about-cds.html

7. The CD ROM True or False CDs are made almost completely of aluminium with a glass face. 5 5 False CDs are 1.2mm thick and mostly contain polycarbonate with a layer of aluminium in them. http://www.factscolumn.com/interesting-facts-about-cds.html