Stevie Wonder (born 1950) is one of the most cherished rhythm-and-blues singers and songwriters of his generation. The 19-time Grammy winner is known for his soulful voice and catchy tunes as well as for his commitment to political and humanitarian causes.
In scientific terms, a variable is something that researchers are studying. Every scientific experiment involves at least one independent variable and one dependent variable. Discover the difference between these two types of variables and review several examples of each type.