Treble: A boys unbroken voice
Soprano: Highest female voice
Tenor: Medium- high in male voice range
Baritones: Medium to low male range
Bass: Lowest male voice
Types of solo songs:
Lied (plural is lieder): A type of German art song used in the Romantic period for solo voice and piano. Inspired by poetry. Always accompanied by the piano, it's job is to mirror the words and show the meaning of the words. Almost a duet between vocalist and piano, both have equal importance
Aria: A long accompanied song for a solo voice, usually in an opera or oratorio
This is one of Mozart's Aria's that is for soprano voice, its probably the highest aria piece.
Opera: a piece of drama set to music, they would act and sing, complete with costume and set.
Oratorio: A Large scale piece for orchestra, choir and soloists, typically sung about religious topics, It would be set out statically unlike an opera.