Scientists need to use scientific names for multiple reasons. Here are three of these reasons. First, it is to avoid confusion. You see, many organisms share a common name and differs from place to place. If scientists used the common names, it could lead to incorrect data. Another reason is that it describes an organism. It brings out the organisms certain characteristics. Lastly, Latin will not change over the years. As you most likely know, Latin is a dead language, or not spoken anymore. These are three reasons why Scientists use the scientific names instead of the common names.