Science Experiment: Investigate how Soil/Clay sinks to the bottom of a bottle

 We were learning about water treatment and purification in Science. We learned how water is treated in a reservoir, before it flows out of your tap. We carried out an experiment to investigate the first stage of water treatment, when floating matter can be removed, and the dirt sinks to the bottom. 

Picture 1: We added pebbles, bits of twigs, grass and soil to our bottle. We filled the bottle with water, closed the lid, and shook it.

Picture 2: After 2 days our water quality had improved. 

Picture 3: The water is much clearer now. Some material has risen to the top. The mud and soil has settled on the bottom.