Compact Disc
A compact disc, also known as a CD, looks like a shiny, round, flat pancake made of plastic. It's really good at storing information in a way that it can be read by a computer or a music player.
When you buy a CD with music on it, the songs are already recorded onto it. When you put the CD into a CD player, it uses a tiny laser beam to read the information on the CD and turn it into sound.
The laser reads the tiny bumps and pits on the CD's surface, which are arranged in a spiral from the center to the edges. Depending on the pattern of bumps and pits, the CD player can tell what the music sounds like and what order the songs go in.
When you're done listening to a CD, you can take it out of the player and put it back in its case to keep it safe. CDs are a great way to listen to music or store important information for safekeeping!
When you buy a CD with music on it, the songs are already recorded onto it. When you put the CD into a CD player, it uses a tiny laser beam to read the information on the CD and turn it into sound.
The laser reads the tiny bumps and pits on the CD's surface, which are arranged in a spiral from the center to the edges. Depending on the pattern of bumps and pits, the CD player can tell what the music sounds like and what order the songs go in.
When you're done listening to a CD, you can take it out of the player and put it back in its case to keep it safe. CDs are a great way to listen to music or store important information for safekeeping!
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