Food Safety and Storage Notes & Questions | Class 5 Environmental Studies (EVS) | Drishti OS

Food Safety and Storage

What you'll learn

Why food can spoil and simple ways to slow this down.
Safe ways to store different foods (refrigeration, airtight containers, drying).
Basic food hygiene: washing hands, washing fruits/vegetables, covering food.
NCERT Looking Around 5 — keeping our food safe to eat.

Key concepts

Level 1 — Why food spoils

Verbal: Food spoils mainly due to the growth of tiny organisms (microbes) and reactions with air, heat, or moisture over time.

Cause of spoilage	Example
Warm temperature	Milk turns sour faster in heat
Moisture	Bread grows mould in damp conditions
Exposure to air	Cut fruit turns brown and dries out
Time	Cooked food left too long becomes unsafe

NCERT link: Understanding why food does not stay fresh forever.

Level 2 — Safe storage and hygiene

Verbal: Simple, practical methods help food stay safe and fresh for longer.

Real-life: Refrigerators slow spoilage by keeping food cold; airtight containers keep out air and pests; drying removes moisture microbes need to grow.

Method	How it helps
Refrigeration	Slows growth of spoilage-causing microbes
Airtight containers	Keeps out air, moisture, and pests
Drying	Removes moisture needed for spoilage
Washing hands and food	Reduces germs before eating
Covering food	Keeps out dust, flies, and germs

Worked example

Why does milk spoil faster if left outside on a hot day than if kept in the refrigerator?

Step 1 — Warmth helps microbes in milk grow and multiply quickly.
Step 2 — The refrigerator's cold temperature slows this microbial growth.
Answer: Cold storage keeps milk fresh for longer by slowing spoilage.

Suggest two ways to keep cooked rice safe to eat the next day.

Step 1 — Cover the rice to protect it from dust and flies.
Step 2 — Store it in the refrigerator to slow the growth of any microbes.
Answer: Covering and refrigerating both help keep the rice safer for later.

Common mistakes

Mistake	Why it happens	Fix
All food spoils at the same speed	Not noticing differences	Some foods spoil faster (milk) than others (dried grains)
Refrigeration stops spoilage forever	Overestimating cooling	Refrigeration only slows spoilage, it does not stop it completely
Washing hands is only about looking clean	Missing the germ connection	Washing hands removes germs that could contaminate food
Covering food is just to keep it neat	Ignoring safety role	Covering food protects it from dust, flies, and germs

Quick check

Name two causes of food spoilage.
Name two safe storage methods and how each helps.
Why should we wash fruits and vegetables before eating them?
Stretch: Why does drying food (like grains or fruit) help it stay safe for a long time?

Revision tip: List three foods from your kitchen and write the best way to store each one safely.

Open the Practice tab for graded questions on Food Safety and Storage.

Food Safety and Storage