Learn how to calculate a tip without a calculator easily in your head. See examples and know how much to tip for different services. How to Calculate a Tip Without a Calculator This entry was posted on December 9, 2021 by Anne Helmenstine (updated on December 12, 2021)
Perform the tin hedgehog experiment and grow spiky tin crystals. Here are two easy methods and a look at the chemistry of how it works. Tin Hedgehog Experiment – Easy Metal Crystals This entry was posted on December 8, 2021 by Anne Helmenstine (updated on January 1, 2023)
Learn about Dalton's law of partial pressures. Get the definition, formula, examples, and worked problems for this ideal gas law. Dalton’s Law of Partial Pressure – Definition and Examples This entry was posted on December 7, 2021 by Anne Helmenstine (updated on November 29, 2022)
Perform the genie in a bottle chemistry demonstration and learn the chemistry behind how this exothermic reaction works. Genie in a Bottle Chemistry Demonstration This entry was posted on December 5, 2021 by Anne Helmenstine (updated on September 21, 2022)
Learn about the kinetic molecular theory of gases. See the assumptions the theory makes and get worked example problems. Kinetic Molecular Theory of Gases This entry was posted on December 4, 2021 by Anne Helmenstine (updated on August 17, 2022)
Learn how to make a cloud in a bottle or jar. Here are three easy methods and a look at the science behind how they work. How to Make a Cloud in a Bottle – 3 ... This entry was posted on December 2, 2021 by Anne Helmenstine (updated on April 27, 2022)
Learn how to make glowing bubbles with these simple recipes. Make bubbles really glow in the dark or else glow under black light. How to Make Glowing Bubbles This entry was posted on December 1, 2021 by Anne Helmenstine (updated on April 5, 2023)
Learn about the activity series of metals or reactivity series and get a chart to print. Learn how to use the activity series in chemistry. Activity Series of Metals (Reactivity Series) This entry was posted on November 30, 2021 by Anne Helmenstine (updated on May 24, 2022)
Learn what entropy is in chemistry and physics. Get a simple definition and scientific definition and see entropy examples. What Is Entropy? Definition and Examples This entry was posted on November 28, 2021 by Anne Helmenstine (updated on November 30, 2021)