How are a marching band and a orchastra different?

Answer 1

Bands don't have a string section if they are classed as brass, silver or marching band. If they are a "dance band" similar to that we see in the period of Glen Miller then they would have had double bass

Answer 2

Marching band includes strictly brass and woodwind intruments, and march on field, as to orchestra which is made up of all string instruments and play in a sit down concert enviroment.

Answer 3

Sometimes yes, sometimes no. Some small schools have small bands, but most Marching Bands are bigger than orchestras.