Utilization of physical and chemical changes in everyday life
Utilization of physical change
It is utilized in industry of medicine and pesticide. Physical change is used to get substance from material by extraction.
Example:
- Extraction of tannin from tea leaves
- Extraction of caffeine from coffee beans.
- production of ice cream
Utilization of chemical change
It is utilized to get material which seldom to find and give benefit to human and environment.
Example:
- Industry of plastic (PVC, PP, PE)
- Cooking cake
EXERCISE 2
- Examine benefit of change in making tape!
- Examine benefit of change in making rice flour!
- Write 3 examples of physical change!
- Write 3 examples of chemical change!