Rhythm refers to the pattern of sounds and silences in music. It is created by the arrangement of notes and rests, determining how music flows over time. Rhythm can be regular or irregular, and it often includes elements like beats and tempo, which help to establish the pace of a piece. Melody is a sequence of musical notes that are perceived as a single entity. It is the tune of a song, often the most memorable part that listeners hum or sing along to. Melodies can vary in pitch and length, and they are typically supported by harmony, which adds depth to the overall sound.