Natural Water Filter (Background Research)

Today I visited my local bunnings warehouse to buy the materials needed to make the natural water filter. A natural water filter is a filter which is made of natural materials such as pebbles, sand and charcoal in which removes dirt and other substances from a liquid. 

Materials I brought from Bunnings 

Example of the Water Filter I will be constructing 

Importance of Clean Water

Water covers two-thirds of the Earth's surface and makes up about 60% of adult's bodies, including 75% of our brains! Each day we need to consume more than two liters of water through liquids we drink and foods we eat. Although there's plenty of H2O around, much of it is either inaccessible or inconsumable to humans due to its cleanliness. But with water treatment, we're able to purify water and get clean drinking water that can be used in many poorer countries in the world who do not have access to clean water. 

How does it work?

Each time the water passes through a different layer, it becomes cleaner. First, the gravel/rock layer catches large pieces of debris, such as twigs, leaves, and bugs. Next, the sand layer catches smaller particles, such as dirt and grit, and makes the water look clean. Finally, the charcoal layer gets rid of bacteria and some chemicals and the fine sand layer extracts even smaller particles that the other layers could not pick up. 

I have also been to Woolworths to gather items for my experiment including: coffee filter paper, plastic spoons and cups and Coca-Cola etc.