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How do liquids and gases affect the particles placed into them? Young chemists witness the phenomena first described by scientist Robert Brown known as Brownian Motion. The third installment in a 14-part series on solids, liquids, and gases shows the mechanism of the motion using simple examples scholars can reproduce in class.
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Instructional Ideas
- Perform the demonstration described in the video using a flashlight in a darkened classroom
- Challenge lab groups to come up with experiments that illustrate Brownian Motion
Classroom Considerations
- Pupils need no prior knowledge to benefit from the content of this video
Pros
- Through describing Brown's observations and theory upon witnessing pollen grains in motion for the first time, learners can connect this information with the concept of new information replacing old in the development of scientific theories
- The animations in the video help illustrate the interactions between atoms and the particles they encounter
Cons
- None