In this activity, student mix a given quantity of salt with a fixed volume of water. Mass and volume measurements are made before and after mixing to determine if these quantities change. Students observe that mass is conserved during dissolving while volume is not.
Written by Alexandra Arcese, Don Galbraith Award Winner 2019-20, Western University This article explores how to promote critical thinking in the classroom using the Question Formulation Technique... read more
This demo shows how flakes of iron can be extracted from iron-fortified cereals with the use of a strong magnet. The demo shows a physical separation process and provides students with a good example... read more