The distance of two half-steps between two pitches.

Music that contains more than one melody, of equal importance, sounding at the same time.  

Name a melodic (pitched) percussion instrument.

Pitches possessed of vibrations that are in accord with each other, or at rest.

The distance between any two pitches

A musical thought, constructing a musical sentence.

Musical material of interest that is the most important and memorable, involving the succession of pitches that fall into units, one after another, of completeness and can contain emotion and meaning for the listener.

Name a non-melodic (non-pitched) percussion instrument (do not say “drum” – be more specific).

A consistent pattern of stressed and unstressed beats with a measure.

Name a brass instrument.