Introduction
There are some things, materials, substances that we use every day, but we don't know how they are made. When starting to learn about substances (in this case detergents) that we use in everyday life it is important to understand how and what they are made of.
Task
To understand how detergents are made, you will have to watch the video. At first, read the questions, so you know what you have to search for in the video. Secondly, prepare a paper and pen to put down the answers. Third, watch the video with subtitles to correctly write the answers to questions. After doing the task, check the answers and use them in lessons and tests.
Process
Be sure to read through all of the directions in each section before you start the video. If you can't answer the questions on the first try, watch it another time.
- From what French scientist discovered to make inexpensive lie?
- From what and how people made soap?
- What German scientist invented in 1916?
- What kind of detergents this company makes?
- Salt in powdered ones are used as...
- What is surfactant?
- To lift away dirt they use...
- What mixture boosts the mixtures alkalin level?
- How many types of surfactants the soap in video needs?
- What are used to add color?
Evaluation
Answer key:
- Table salt
- Boiling wood ashes with animal fats
- Synthetic detergents
- Liquid and powder
- As a filler
- A substance that creates foam
- Pine oil
- Sodium metasilicate
- 3
- Powdered pigments
If you got right:
1) 1-3, you failed. Watch it again and make sure you listen carefully.
2)4-6, you did almost ok. Watch the video again and try to pay attention to details.
3)7- 9, you did well. Read a bit about detergents.
4)10, perfect. You have learned about detergents perfectly.
Conclusion
Congratulations, you have learned about how and from what detergents are made of. This will help you in your everyday life and while learning about detergents in school.