There is a rule of thumb that you need a tripod if your shutter speed is greater than your lens's focal length: 1/50 for a 50mm lens, or 1/250 for a 250mm lens.
Hope this helps...
To match the given words to their respective definitions:A syncopation is a rhythmic emphasis occurring in unexpected places, such as on the second and fourth beats.A blue note is a flatted tone on the third, fifth, or seventh step of a major scale. Improvisation is melodies or rhythms created on the spot. An accent is a rhythmic emphasis on notes that fall off the beat or notes held across the beat.