CBSE/NCERT/Exercises/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
NCERT Biology Exercises for Class 05 EVS - The Mystery of Food
Why do some food items last for weeks and others spoil in just a few days? Answer: Food items last longer if they are dry, kept in airtight containers, or stored in a cool place like a fridge. Items that contain a lot of moisture and are left in a warm, open place provide the perfect conditions for microbes to grow and cause spoilage within a few days.
You are going on a field trip for two days. List five food items you will carry. How will you keep them from getting spoiled? Answer: I would carry:
What if food cannot be preserved? Imagine a world without food preservation and discuss the consequences. Answer: In a world without food preservation:
Match the food item (A) with its preservation method and final product (B).
What are the three main things microbes need to grow? Answer: Microbes need moisture (water), air, and the right (warm) temperature to grow.
What happens to food inside your mouth when you chew it? Answer: When you chew food, your teeth break it down into smaller pieces. This releases saliva, which mixes with the food to make it mushy and easier to swallow, and also starts the chemical process of digestion.
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