by STAO ADMIN | Nov 13, 2019
This activity introduces students to a consumer product that has many different types of polymers. Students will dissect a disposable diaper and take note of different types of polymers used in this consumer product. They will focus on the use of sodium polyacrylate...
by STAO ADMIN | Nov 13, 2019
Teachers are required to have fire safety training and permission of the employer before going forward with this demonstration. The purpose of this demonstration is to illustrate an example of an exothermic reaction while looking at chemical properties of an alcohol....
by STAO ADMIN | Nov 13, 2019
There are many different kinds of polymers, both natural and synthetic. Polymers are widely used and have many practical applications based on their properties. They are often strong and chemically stable. Examples of natural polymers include proteins, starch,...
by STAO ADMIN | Nov 13, 2019
The distinction between diffusion and osmosis is not clear to many students. Observing coloured particles (such as food dye) diffuse in water shows direct evidence of diffusion, but the movement of water particles is not so easily observed. This demonstration prepares...
by STAO ADMIN | Nov 13, 2019
This activity illustrates the effect of intermolecular forces on surface tension of a liquid. Students attempt to place drops of various types of liquids on the face of a penny (or any available coin). The substances with stronger intermolecular forces have greater...
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