The process of pouring a mixture though a filter to catch the larger particles while allowing the smaller particles to pass through and collect beneath is known as

This process is called filtration. This process is a solid-fluid separation by the use of a medium wherein only the fluid (gases or liquids) can go through it. The medium is called the filter while the fluid that passed through the filter is called the filtrate. The solid particles are the large particles which cannot pass through the filter.

Answer is to avoid experimental error