Osmosis is the process by which the concentrations of two solutions, separated by a selectively permeable membrane, equalize by the movement of a solvent such as water. This demonstration shows that the ability of plant cells to absorb water is decreased by heating. This observation can be explained by the hypothesis that heat damages the selectively permeable membranes surrounding the cells, and that this reduces that cells’ ability to carry out osmosis.
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
Categories: Lab/Student Activity
Through inquiry, students will learn basic needs for birds and why certain elements of human activity are a hazard for birds. They will then provide solutions to keep birds safe. Other... read more
This integrated set of activities strives to incorporate learning out of doors, environmental connections to the grade 5 science topic of Conservation of Energy and Resources as well as big ideas... read more