PITCH refers to the relative highness (Soprano) and lowness (Bass) of sounds. Definite pitch is shown on the five line musical stave using special note shapes. The name of the pitched notes uses the first seven letters of the alphabet: A,B,C,D, E, F and G.
The following image is a summary of how the pitches are set on the lines and spaced of the staff.
Study this page. Print it so you can keep it in your music folder asa a reference.