The main part of the song
Melody
1 player or singer
Solo
The speed of the music
Tempo
Differences in something
Contrast
The order of a song or piece of music
Form
2 players or singers
Duet
The person in charge of the whole musical group
Conductor
A tool used to keep time
Metronome
A rhythmic hit or strike
Beat or Pulse
A strong, regular, repeated pattern of movement or sound
Rhythm
3 players or singers
Trio
The parts of a song that enhance the melody
Harmony
Tone of the music
Timbre
A rhythmic hit or strike
Beat or Pulse
The volume of the music
Dynamics
4 players or singers
Quartet
The shape of the music
Melodic Contour
A musical sentence
Phrase
A musical part that is played with a melody
Accompaniment
5 players or singers
Quintet
Use of feeling and meaning in a song
Expression
Distance between 2 notes
Interval