This demo illustrates the presence of atmospheric air pressure and shows how the force that it exerts is greater than the force of gravity in some situations.
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Teacher Demo/Student Activity: Limit to Cell Size
Categories: Lab/Student Activity, Teacher Demonstration
Cells require a constant supply of glucose and oxygen to produce energy. Cellular respiration occurs in the mitochondria of a cell. As a result of this process, large quantities of waste carbon... read more
Teacher Demo/Student Activity: Iron in Cereal
Categories: Lab/Student Activity, Teacher Demonstration
Food labels often contain the word "fortified". This means that one or more ingredients have been added that are not normally found in that food item. The purpose is to increase the amount of that... read more
Teacher Demo: From Gums to Bums
Categories: Teacher Demonstration
This demonstration uses food and a series of containers and additives to model the process of mechanical and chemical digestion in the human (mammalian) digestive system. The demonstration begins... read more