Friday, August 26, 2011
Rainbow in test tube and Making rubber ball @PSN 16 August 2011
Our experiments today.
Bottles of liquid that vary in density.
It varies in the amount of ethyl alcohol.
Used a pipette to drop 5ml of each liquid contents into the test tube.
Red liquid which contains only water and red food colouring, sank to the bottom.
Purple liquid has only ethyl alcohol float on top.
Hui drew rainbow on her worksheet.
Making of rubber ball.
Pour 5ml of water into the glue.
Drop some food colouring.
Add in Borax, 5ml at a time and stir. The liquid became half solid.
solid rubber ball.