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Direct linkOdom, Arthur L.; Bell, Clare V. – Science Teacher, 2019
In 1827, Robert Brown noticed pollen suspended in water bouncing around erratically. It wasn't until 1905 that Albert Einstein provided an acceptable explanation of the phenomenon (Kac 1947): Brownian motion is the random movement of particles (e.g., pollen) in a fluid (liquid or gas) as a result of collisions with atoms and molecules. Movement of…
Descriptors: Science Instruction, Molecular Structure, Motion, Scientific Concepts
Lisensky, George C.; Horoszewski, Dana; Gentry, Kenneth L.; Zenner, Greta M.; Crone, Wendy C . – Science Teacher, 2006
Phase changes and intermolecular forces are important physical science concepts but are not always easy to present in an active learning format. This article presents several interactive activities in which students plot the melting points of some fatty acids and explore the effect that the nanoscale size and shape of molecules have on the…
Descriptors: Active Learning, Chemistry, Heat, Molecular Structure
