Here are some instances that would prompt a screening test: 1  Youâre sexually active. Everyone who is sexually active (even if youâve only ever had one partner and always use protection) should be screened at some point. 2  Youâre having unprotected sex.
The most important melody in a piece of music is called the theme. The theme of a piece makes up the principal melodic material. Theme is a general term for the basic subject matter in a piece of music. Fast pieces have short themes.
While the term song usually refers to a sung melody, the term is also used in some instrumental music in which the composer wishes the performer to play in a singing style (e.g., Mendelssohn's Songs Without Words for solo piano.)