Final answer:
Brick, tile, and pottery are some of the products made by firing clay in a kiln, which transforms and hardens the material. These methods date back thousands of years and have evolved to include a variety of techniques and finishes such as the use of a slip to create pottery with different colors and textures.
Step-by-step explanation:
Various products are made by firing clay or similar materials in a kiln, including brick, tile, and pottery. Brick, a well-known building material, has been in use since about 7500 BCE and was made by ancient civilizations through mixing earth and water, forming them into shapes and allowing them to harden in the sun or firing them in kilns for greater strength.
Tile has been used for decorative and functional purposes in many cultures and is typically made from clay that is shaped, dried, and then fired at high temperatures to achieve durability and sometimes glossy finishes.
Pottery encompasses a broad range of items such as pots, bowls, and urns. The techniques used to create pottery can vary widely, from hand-shaping like coil building and pinch potting to using a potter's wheel, and can result in various surface treatments including applying a slip (liquid clay) that changes color upon firing in a kiln, as temperatures can reach about 900 degrees Celsius.