Monthly Archives: February 2020

Strong and Weak Acids — Strong and weak acids are key concepts in chemistry. Strong acids completely dissociate into their ions in water, while weak acids incompletely dissociate. There are only a few strong acids, but many weak acids. Strong Acids Strong acids completely dissociate in water into their ions and produce one of more […]

List of Common Strong and Weak Acids

This entry was posted on February 28, 2020 by Anne Helmenstine (updated on February 14, 2023)

Test Tubes of Blue Liquid — The blue bottle reaction is a classic color change chemistry demonstration. It interests students in chemistry, introduces the scientific method, and illustrates oxidation and reduction (redox reactions) and chemical kinetics. The reaction starts as a blue liquid which becomes colorless and returns to its blue color. Materials The usual materials […]

Blue Bottle Chemistry Demonstration

This entry was posted on February 27, 2020 by Anne Helmenstine (updated on October 31, 2021)

Here are the names, element symbols, and atomic numbers of the first 20 elements of the periodic table. — Get the names and symbols of the first 20 elements of the periodic table. Learn how to use element names to predict facts about the elements.

What Are the First 20 Elements – Names and Symbols

This entry was posted on February 26, 2020 by Anne Helmenstine (updated on January 9, 2023)

Flowers are that special bit of color to any landscape. They make generic green bushes into distinctive and unique objects of attention. This flowers wordsearch contains the common names for 39 of these colorful blossoms.

Flower Word Search

This entry was posted on February 25, 2020 by Todd Helmenstine (updated on May 10, 2021)

Gatorade and drain cleaner color change — The Gatorade and drain cleaner color change chemistry demonstration is a variant of the classic blue bottle demo. You can customize the demo to get a range of colors. The best part is you don’t need access to a chemistry lab for the materials, so this is a great project […]

Gatorade and Drain Cleaner Color Change Chem Demo

This entry was posted on February 25, 2020 by Anne Helmenstine (updated on May 10, 2021)

How to Make Glowing Flowers — It's easy to make real flowers glow under black light or even in the dark. Here is a collection of glowing flower recipes.

How to Make Glowing Flowers

This entry was posted on February 24, 2020 by Anne Helmenstine (updated on April 5, 2023)

Hot and Cold Volcanoes — Learn about endothermic and exothermic reactions by making cold and hot chemical volcanoes. This project is more entertaining than mixing chemicals in beakers and measuring their temperatures. The volcanoes use common, safe household ingredients. Endothermic and Exothermic Reactions An endothermic chemical reaction absorbs energy from its environment, so the reaction […]

Hot and Cold Volcano: Easy Endothermic and Exothermic Reactions

This entry was posted on February 23, 2020 by Anne Helmenstine (updated on October 24, 2021)

A field of scientific study is called an ology. Most science fields have names with an -ology suffix. Here is an alphabetical list of science ologies and what they study. A list of non-ology sciences is also provided. Alphabetical Ology List of Sciences Abiology: The study of nonliving or inorganic […]

Ology List of Sciences

This entry was posted on February 21, 2020 by Anne Helmenstine (updated on March 29, 2023)

Water Into Wine or Blood Chemistry Demonstration — Turn water into wine or blood with this simple color change chemistry demonstration. Of course, you're not really making wine or blood!

Water Into Wine or Blood Chemistry Demonstration

This entry was posted on February 20, 2020 by Anne Helmenstine (updated on January 19, 2022)