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Categories: Teacher Demonstration
This activity involves the surprising neutralization reactions between the carbonic acid that forms when the carbon dioxide in one’s breath reacts with water and calcium hydroxide. read moreCategories: Lab/Student Activity, Teacher Demonstration
This activity allows students to explore the composition of the candy Pop Rocks by observing the reactions that take place when Pop Rocks are placed in water. read moreCategories: Teacher Demonstration
This is a classic demonstration that illustrates the power of atmospheric pressure. A small amount of water is heated in a pop can. The can is inverted and submerged in ice-cold water. As a result, the pressure of the gas inside the can is quickly reduced dramatically... read moreCategories: Teacher Demonstration
This demonstration is a dramatic look at the influence of the atmospheric pressure and the relationship of pressure and temperature of a gas. A burning piece of paper is inserted in a bottle and an egg is set on top of the bottle. After the flame is extinguished the... read moreCategories: Lab/Student Activity
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... read moreCategories: Teacher Demonstration
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... read moreCategories: Teacher Demonstration
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.... read moreCategories: Teacher Demonstration
This demonstration shows that the combination of yeast, sugar and water will produce a gas that can be collected. This provides students with an opportunity to draw on prior knowledge to identify the cellular process involved. Students also have a chance to predict... read moreCategories: Teacher Demonstration
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,... read moreCategories: Lab/Student Activity
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... read more