Final answer:
The term that describes using pieces of tile or glass on the surface of an object for decorative purposes is 'mosaic.' Mosaics involve tesserae, which are sealed in place with grout to create durable art pieces used in various ancient and modern structures.
Step-by-step explanation:
The term that describes using geometric pieces of tile or glass on the surface of an object is mosaic. Mosaics are artworks created by assembling small pieces of colored tile, stone, or glass, known as tesserae, to form patterns or images. This ancient technique has been used on various surfaces such as walls, ceilings, and floors. Notable examples include the intricate floor decorations in ancient Greek and Roman homes, the ornamental wall and ceiling embellishments in Byzantine churches, and the flowing designs in mosques. The process involves gluing the tesserae to a surface and then, once the adhesive has dried, applying grout to seal the mosaic in place, ensuring its durability over centuries.