A 1937 commemorative half dollar honored which bloodiest one-day battle of the Civil War?

What are serrated scissors that cut a zigzag edge called? A Columbia Law School graduate, who married museum designer Edwin Schlossberg in 1986? Which word means both a column of smoke and a feather? Which comic dramatist lived from about 446 to 386 B.C.? A commission established in 1987 has sponsored what events every four years since 1988? Which common adverb is also the acronym of a large feminist group? Which common mineral is used to make plaster of Paris? What is a common name for trefoil, a plant with three leaflets?