a Rondo is a principal theme (sometimes called the "refrain") alternates with one or more contrasting themes, generally called "episodes", but also occasionally referred to as "digressions" or "couplets commonly used in the baroque/early classical period
A Sonata is a in summary, a composition of large scale works. (Usually divided into movements) that is a fundamental piece of the piano study
Variations is basically just a different form of the main melody in a piece. Very common in the baroque era. It takes the melody and puts it into a different key, or a different octave etc etc.
Paintings were often done on stone, and portrayed pleasant scenes of the afterlife in tombs. Ancient Egyptians created both monumental and smaller sculptures, using the technique of sunk relief.
