What is the process of a liquid substance passing through a porous substance called?

• A. Percolation
• B. Pestle
• C. Porcelain
• D. Restorative

Answer: (A)

The process described is percolation—the movement of a liquid through a porous substance due to gravity or pressure differences. This term captures how liquids travel through pore spaces in materials like soil, filtering media, or sponges as they seep from one side to the other. In everyday examples, coffee water percolates through grounds, or water moves down through soil, which helps illustrate the idea of a liquid passing through a porous medium. The other words refer to things rather than a process: a pestle is a grinding tool, porcelain is a ceramic material, and restorative is a dental term for fillings or repairs.