Curated OER
Ice Cream
Open this instructional activity by giving a brief history of ice cream. Using liquid nitrogen to lower the temperature, preteens make their own confection. The accompanying activity sheet queries learners about freezing point, the...
Curated OER
Maintaining Plant Genebanks
Students examine the use, costs, and the need for plant gene banks. The rationale for gaining ownership over scientific information and the implications of the developing nations' reliance on biotechnology is explored in this lesson.
Curated OER
The Effects of Temperature on Solids
Students explore the effects that extreme temperatures have on the material properties of solids. They investigate the properties of a material whose state depends on extreme temperatures and witness how it interacts with room...
Curated OER
Heat of Vaporization of Liquid Nitrogen
Students determine the heat energy needed to vaporize (boil) one gram of liquid nitrogen.