Sleep problems are not inevitable as we age, though individuals need to pay attention to healthy sleep habits. Dennis Dean describes how jet lag affects the body and suggests ways to minimize the negative effects.
How is Sleep Regulated? The Science of Sleep Fifty years of research on brain activity and physiological patterns of sleeping has revealed a great deal about what sleep is and what it is not. These are the teacher notes for this experiment.. An Experiment in Alchemy: Copper to Silver to Gold This is a fun experiment to teach students how to identify samples, use a balance, a hotplate, a Bunsen burner, and some lab techniques. Economics of a Chemical Product A techniques experiment that includes a lesson on economics.
Ink Analysis: An Experiment in Paper Chromatography An introduction to paper chromatography based on a forensics experiment. Identification of a Substance by Physical Properties This experiment uses density, solubility and boiling point to identify a substance. Esters: A Microscale Introduction to Organic Chemistry Reactions This is a microscale preparation of some relatively pure organic esters.
Preparation of Synthetic Rubber This contains a microscale preparation of Thiokol Rubber and a macroscale preparation of a rubber ball from rubber latex. Nuclear Chemistry Experiments. Determination of the Half-Life of Potassium Build a Spectroscope How does one identify elements?
For homework search out element spectra in your environment. Empirical Formula of a Compound. Recycling a Metal into a Chemical Compound: The Preparation of Alum An experiment in recycling an aluminum can into a chemical compound. The Aluminum Beverage Can.
An article by William F. Hosford and John L. Duncan, from Scientific American , September , describing the design and manufacture of aluminum beverage cans. Growing Alum Crystals This is what we do with the alum we make in the above experiment. Growing crystals is chemical "magic", that is, it's a little art along with a chemical technique.
Alum can be purchased in most supermarkets. Chemical Reactions. Chemical Reactions This is a conceptual introduction to chemical reactions in microscale.
Students look at properties of the reactants and product and document a chemical change. Osmosis and Dialysis. Used for the introductory chemistry course. Used for the general chemistry course. Solubility of a Salt in Water at Various Temperatures. Total Safety, a leading global provider of integrated safety services, solutions, and equipment, has been awarded the Contractor Safety Achievement Award Rotork launches Lifetime Management services.
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