Which term describes a distance or interval of 8 notes?

Which term describes the volume or how soft or loud the music is?

Which term describes two or more performers singing or playing identical music?

Which term describes a string playing technique meaning plucked?

Which term describes a type of vocal texture that combines voices singing different pitches to create chords?

Which term describes the use of chords, harmony or backing part to support the main melody?

Which term describes the use of notes which are not in the normal scale / key often written as sharps or flats?