At Home for Earth Day: Make a Water Filter

Use common materials from your home and yard to make a basic water filter, and watch it work on muddy water!

Filtration is the process of separating solids from fluids using a a filter—a medium that only the fluid can pass through, leaving the solids “trapped” behind. Natural and human-made filters are all around us: paper filters keep coffee grounds out of freshly brewed coffee; HEPA filters capture dust particles in our vacuum cleaners; our kidneys even act as filters to remove harmful materials from our blood! In nature, dirt is naturally filtered out of water as the water moves through sand, soil, gravel. This is the process that we will be demonstrating today.