BEAT AND METER
In order to define meter, let's first define beats. Beats give music its regular rhythmic pattern. Beats are grouped together in a measure; the notes and rests corresponds to a certain number of beats. Meter refers to rhythmic patterns produced by grouping together strong and weak beats. Meter may be in duple (2 beats in a measure), triple (3 beats in a measure), quadruple (4 beats in a measure) .
DYNAMICS
Dynamics are abbreviations or symbols used to signify the degree of loudness or softness of a piece of music. It also indicates whether there is a change in volume.