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.
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The Challenge: Create a Bridge Simulation
Categories: Lab/Student Activity, Lesson Plan
Students will participate in the following design challenge: With the increase in extreme weather, design a bridge with a specific purpose and adaptations to withstand the weather conditions of the... read more
IT'S A FIXER-UPPER
Categories: Lab/Student Activity
The students will be improving the design of an old house/mall/school/castle by designing and constructing a device that will allow accessibility from one floor to the other so that it fulfills the... read more
Rusty Iron Ball Demonstration
Categories: Teacher Demonstration
This is a Thermite reaction that can be done safely indoors. The rust (Fe2O3) reacts with the aluminum foil (Al) to produce aluminum oxide (Al2O3), elemental iron (Fe) and heat. This reaction is a... read more