Sinner's circle

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/sinner-s-circle

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the conceptual origin?Developed by Herbert Sinner in 1959 at Henkel
2. What is the core variables?Chemistry, Temperature, Mechanical Action, and Time
3. What is the Sinner's Circle and why is it called that?The Sinner's Circle is a simple diagram that shows four parts of cleaning: the chemicals you use, the heat of the water, the scrubbing or rubbing you do, and the time you let them work together. It is named after Herbert Sinner, who created the idea in 1959 while working at Henkel.
4. How do the four parts of the Sinner's Circle work together to clean things?The chemicals break up dirt, the heat speeds up the reactions, the scrubbing lifts the dirt out, and the time lets all of these actions finish cleaning the surface.

Surfactant: A compound that lowers the surface tension between two liquids or between a liquid and a solid, aiding in cleaning.
Enzymes (in cleaning): Biological catalysts that break down specific types of stains, like proteins or fats.
Efficacy: The ability of something, like a cleaning product, to produce the desired result.