What are the key differences between a sonata and a concerto in classical music?

The key difference between a sonata and a concerto in Classical Music is how they feature solo instruments. In a sonata, the solo instrument is typically accompanied by a piano or small ensemble, while in a concerto, the solo instrument is accompanied by a full orchestra. Additionally, a concerto usually has multiple movements, each showcasing the soloist's virtuosity, while a sonata typically has three or four movements with more equal distribution of musical material between the soloist and accompaniment.