Get the definition of a force in science. See the units and get examples, including the four fundamental forces. Force Definition in Science This entry was posted on March 30, 2022 by Anne Helmenstine (updated on August 27, 2023)
Make natural Easter egg dyes in all the colors of the rainbow using safe cooking ingredients with these simple recipes. Natural Easter Egg Dyes This entry was posted on March 29, 2022 by Anne Helmenstine (updated on September 13, 2023)
Learn about Lewis acid and base theory. See examples of Lewis acids and bases and learn how they differ from Bronsted acids and bases. Lewis Acid and Base Theory This entry was posted on March 27, 2022 by Anne Helmenstine (updated on February 14, 2023)
Get facts about viruses. Learn their key characteristics, how big they are, how they reproduce, and some diseases they cause. Facts About Viruses This entry was posted on March 26, 2022 by Anne Helmenstine (updated on June 21, 2022)
Get physical science worksheets and handouts. Topics include chemistry, physics, Earth science, astronomy, geology, and meteorology. Physical Science Worksheets and Handouts This entry was posted on March 24, 2022 by Anne Helmenstine (updated on June 20, 2022)
Learn what the law of reflection is. Get its definition and explore the difference between specular and diffuse reflection. Law of Reflection This entry was posted on March 23, 2022 by Anne Helmenstine (updated on November 29, 2022)
Learn why rings turn your finger green or black or even red. See which metals cause problems and how to prevent discoloration. Why Do Rings Turn Your Finger Green or Black? This entry was posted on March 22, 2022 by Anne Helmenstine (updated on December 30, 2022)
Get the Young's modulus definition and formula in science and engineering. See an example problem and table of values. Young’s Modulus Formula and Example This entry was posted on March 20, 2022 by Anne Helmenstine (updated on May 4, 2022)
Learn the difference between active and passive transport and get examples of each type of transport process in the cell. Active and Passive Transport – Overview and Differences This entry was posted on March 19, 2022 by Anne Helmenstine (updated on December 21, 2022)