Daily Archives: June 1, 2015

Electron micrograph of Salmonella bacteria. (National Institute of Allergy and Infectious Diseases) — Salmonella poisoning has been around forever, but you may not have heard much about it before the recent food recalls and you may be confused about what Salmonella does and how you can protect yourself from Salmonella poisoning. Why Salmonella Is Toxic Salmonella is a type of bacteria that is […]

How Salmonella Poisoning Works

This entry was posted on June 1, 2015 by Anne Helmenstine (updated on May 21, 2018)

Unless a bubble is popped on purpose, it will naturally pop from the top rather than the bottom. (carterse) — Do bubbles pop from the top or bottom or do they pop from the side or is it random? Here’s what happens if you let a bubble pop on its own: A soap bubble consists of a thin layer of water trapped between two layers of soap molecules. The liquid […]

Do Bubbles Pop from the Top or the Bottom?

This entry was posted on June 1, 2015 by Anne Helmenstine (updated on May 28, 2023)

Coin Floating on Liquid Mercury (Alby) — A heavy metal, in the general sense, is a metal which is toxic and has a high density, specific gravity or atomic weight. Examples of heavy metals include lead, mercury and cadmium. Is “Heavy Metal” a Misleading Term? However, according to the International Union of Pure and Applied Chemistry or […]

What Is a Heavy Metal?

This entry was posted on June 1, 2015 by Anne Helmenstine (updated on June 11, 2023)