The basic difference is that quiet can mean little or no noise, but silent means ZERO noise. If you describe somebody as quiet, it means that person doesn't talk very much. People can also talk quietly (with a very low volume) but it’s impossible to talk silently!
Science Facts
Green potatoes contain a poison, solanin, which can be deadly. It develops in old potatoes that are not kept in the dark. Eating 2 kilograms (4.4 pounds) of green potatoes could be fatal. .. More >>