Water filter experiments

In Room 5 we have been learning about water safety.

 We had to do an experiment with one other person 

and try to create a water filter out of any 4 materials.

 These were our options: Cotton balls, Sand, Paper

 towels, and Bark. Me and Kayano used Cotton balls 

and paper towels. What you had to do was have two 

containers one with a hole on the bottom and one

 with no holes. You had to place the one with the

 hole on top of the other one. Then you had to put in

 your chosen materials and then pour water on the 

materials. The water had Cooking oil,Paper, and

 Compost in side. Me and Kayano's filter worked

 OK. All the bits didn't go through but our end

 result was a bit yellow. I really enjoyed doing

this experiment.