Glucose and oxygen react together in cells to produce carbon dioxide and water and releases energy. The reaction is called aerobic respiration because oxygen from the air is needed for it to work.
Tone color, also known as timbre, is the quality of a sound that is not characterized as frequency (pitch), duration (rhythm), or amplitude (volume).
In songs, the lyrical phrase that is repeated and summarizes what the song is about is called a hook.. In terms of the music itself, the series of notes, chord pattern or musical phrase that are repeated is called a riff..