CBSE/NCERT/Notes/Class_05_EVS
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Note on The Mystery of Food - Class 05 EVS
Food can spoil if left out for too long. This is caused by microbes (like mould), which are tiny living things that are all around us—in the air, water, soil, and even inside our bodies.
Don't Eat That! If you see even a small patch of mould on a slice of bread, do not eat any part of it. The roots of the mould (called hyphae) have likely spread throughout the bread, even if you cannot see them.
Microbes need three main things to grow on food:
Not all microbes are bad. Some are very helpful:
The Magic of Curd To make curd, we add a small spoonful of old curd to warm milk. This "starter" contains millions of Lactobacillus bacteria that multiply and turn all the milk into curd overnight!
We can save food from spoiling by removing one or more conditions needed for microbial growth:
A Long Tradition In ancient times, before refrigerators were invented, people in India preserved meat and fish by salting and drying them in the sun, a method that is still used today in many coastal regions.
The process of breaking down food begins in the mouth:
/CBSE/NCERT/Notes/Class_05_EVS/Chapter_03_The_Mystery_of_Food.mdx