Describing the number density of molecules involved in chemistry demonstrations while presenting those demonstrations can help to convey concepts such as the small size of molecules and how the distance between molecules can vary during change of physical state.
Short descriptions of demonstrations and props that Dean Campbell has used while teaching his collegiate Environmental Chemistry course. Many of these examples are also suitable for use in high school and collegiate General Chemistry courses.
Flash rocks were discussed in a previous post as stones made of quartz that produce light by triboluminescence when struck together. This post provides some description of their origins and tips on how to find them, making connections to some of their properties.
Can Alkaline Water Change the pH of your body? We use chemistry to put this claim to the test!
The Wisconsin initiative for Science Literacy has published Science Climate Concepts Fit Your Classroom - A Workbook for Teachers. This is a free online Workbook, readily available for secondary teachers and college faculty. This workbook includes many hands on activities that incorporate traditional science classroom concepts within the context of climate science.
The concept of density is investigated regularly- in lecture, lab, or both- in Introductory (non-science majors) or the majors General Chemistry 1 courses. This post describes a short activity involving ice core density.
The solution to Chemical Mystery #17 is presented. Were you able to use your chemical knowledge to explain the results?
Doug Ragan been using magnets of elements and subatomic particles for some time to help his students visualize what is happening at the particle level of chemistry. Download the files attached to the post and print out your own set of elements and particles!
Have you ever seen the liquid nitrogen cloud? Do you wonder how the cloud forms when hot water is thrown onto liquid nitrogen? This post explores the liquid nitrogen cloud and possible explanations for its formation.
The solution to Chemical Mystery #15: The Leaky Cup is shown here.