High School Water Conservation Booklet Name: - Bundaberg ...

Waterway Pollutants: O 2 DepletingAnimal wastes such as animal droppings, organic wastes such as grassclippings and phosphates from some fertilisers and detergents can causea drop in oxygen level. When this happens, aquatic life is also effected.Completed the following experiment.You will need:♦ 3 clear containers with lids♦ Cotton buds♦ Grass clippings♦ Animal manure♦ Pond water♦ Methylene blueAction:♦ Half fill three jars with pond water.♦ Place grass clipping with soil in small square of cloth and enclose with string.♦ Place animal manure in small square of cloth enclose with string.♦ Place grass clippings satchel in one jar.♦ Place animal manure satchel in another♦ Leave third jar as a control jar♦ Add methylene blue until water turns a light blue.♦ Place lids on jars and leave for a week.♦ Methylene blue will fade if there is no oxygen in the water but will turn blue if oxygen ispresent.Observe and record:♦ Colour of water in jars after one week.♦ Which jar lost its colour first?Type of jars Colour Oxygen presentGrass clippingsAnimal manureControl23