NCERT Class 4 EVS • New NEP 2020 / NCF 2023

Chapter 5: Food for Health

Nutrition, Digestion, Cooking Methods, Traditional Preservation & Safe Water | CBSE Session 2026–27

Core Pedagogical Competencies & Concepts
  • The major nutrient groups: Carbohydrates, proteins, fats, vitamins, minerals, dietary fibre (roughage), and water.
  • The journey of food: Ploughing, sowing, irrigating, harvesting, storage in mandis, distribution, and cooking.
  • Cooking techniques and nutrient preservation: Boiling, steaming, roasting, shallow frying, and fermentation.
  • Food preservation principles: Sun-drying, salting, sugaring, pickling, and refrigeration to prevent microbial spoilage.
Balanced Diet — The Five Essential Nutrient Pillars 🌾 Energy Giving Carbs & Fats 🥛 🫘 Body Building Proteins 🍎 🥕 Protective Food Vitamins/Minerals 🥗 Roughage Digestive Fibre 💧 Hydration Clean Water A balanced diet provides all nutrients in proper proportions for growth, immunity, and stamina.

All Textbook Exercises & In-Text Tasks (14 Questions)

100% Complete Ingestion
Q1 Nutritional Science • Balanced Diet
What is a 'balanced diet'? Name the three major functional groups of food and provide two food sources for each.
[4 Marks]
✅ Step-by-Step Solution & Working
1. Balanced Diet:
A balanced diet is a meal plan that contains all essential nutrients (carbohydrates, proteins, fats, vitamins, minerals, roughage, and water) in the right quantities required for growth, tissue repair, disease defense, and daily physical activity.

2. Three Functional Food Groups:
• Energy-Giving Foods (Carbohydrates & Fats): Supply instant and stored energy. Sources: Rice, wheat, potatoes, bananas, butter, ghee, nuts.
• Body-Building Foods (Proteins): Build muscles, repair worn-out cells, and promote height growth. Sources: Pulses, milk, paneer, eggs, fish, soybean.
• Protective Foods (Vitamins & Minerals): Boost immunity, protect against infections, and keep eyes, skin, and bones healthy. Sources: Green leafy vegetables (spinach), citrus fruits, carrots, papaya.
CBSE Step-by-Step Marking Scheme
Scientific definition of a balanced diet 1.0 M
Clear categorization of 3 groups with 2 correct sources each 3.0 M
Q2 Culinary Science • Cooking Methods
Why do we cook food before eating? Why is steaming considered healthier than deep frying?
[3 Marks]
✅ Step-by-Step Solution & Working
1. Reasons for Cooking Food:
• Kills harmful disease-causing bacteria and parasites present in raw ingredients.
• Breaks down complex starches and tough plant fibers, making food soft, palatable, and easily digestible.
• Enhances taste, aroma, texture, and visual appeal.

2. Steaming vs. Deep Frying:
• Steaming cooks food gently using water vapour without submerging it in oil. It retains delicate water-soluble vitamins (like Vitamin C and B-complex) and natural flavours without adding unhealthy cholesterol.
• Deep frying exposes food to extreme heat, destroying vitamins and loading the food with excess trans-fats and calories that cause obesity and digestive sluggishness.
CBSE Step-by-Step Marking Scheme
Three solid reasons why food is cooked 1.5 M
Nutritional contrast between steaming and deep frying 1.5 M
Q3 Food Preservation • Methods & Principles
Explain three traditional methods of preserving food at home. How do they prevent food spoilage?
[3 Marks]
✅ Step-by-Step Solution & Working
Three Traditional Preservation Methods:
1. Sun-Drying (Dehydration): Removing all moisture content from foods by spreading them in strong sunlight. Without moisture, bacteria and fungi cannot grow. Examples: Raw mango slices (amchur), red chillies, papads.
2. Pickling in Salt & Mustard Oil: High salt draws out water from microbial cells (osmosis), and an oil layer on top blocks contact with airborne oxygen, preventing bacterial multiplication. Examples: Mango, lemon, and amla pickles.
3. Sugar Syrupping: Storing boiled fruits in thick, concentrated sugar syrup where microbes cannot survive due to high osmotic pressure. Examples: Murabba, fruit jams.
CBSE Step-by-Step Marking Scheme
Naming three distinct traditional preservation methods 1.5 M
Scientific principle of microbial inhibition explained for each 1.5 M
Q4 Food Hygiene • Safe Handling
What precautions should be taken to ensure that drinking water is completely safe from contamination?
[2 Marks]
✅ Step-by-Step Solution & Working
Precautions for Safe Drinking Water:
1. Boiling: Boiling water vigorously for at least 10–15 minutes kills all bacteria, viruses, and amoebic cysts.
2. Covered Storage: Always store drinking water in clean, covered vessels or earthen pots fitted with a tap.
3. No Hand Dipping: Never dip unwashed fingers or glasses directly into storage pots; always use a clean, long-handled ladle or tap.
CBSE Step-by-Step Marking Scheme
Mentioning boiling and two hygienic handling/storage rules 2.0 M
Q5 Balanced Diet • Food Nutrients
What is a balanced diet? Name the three main food groups needed for good health with examples.
[4 Marks]
✅ Step-by-Step Solution & Working
Balanced Diet & Food Groups:
A diet containing all essential nutrients in proper proportions for healthy growth.
1. Energy-Giving Foods: Carbohydrates and fats (e.g., Rice, Wheat, Potatoes, Ghee).
2. Body-Building Foods: Proteins for muscle repair and growth (e.g., Pulses, Milk, Paneer, Eggs).
3. Protective Foods: Vitamins and minerals to fight diseases (e.g., Fresh green leafy vegetables, Citrus fruits).
CBSE Step-by-Step Marking Scheme
Definition of balanced diet 1 M
Three food groups with accurate examples 3 M
Q6 Traditional Preservation • Methods
Explain three traditional methods used in Indian households to preserve food from spoiling.
[3 Marks]
✅ Step-by-Step Solution & Working
Food Preservation Methods:
1. Pickling in Oil & Salt: High salt and oil prevent microbial and bacterial growth in mangoes and lemons.
2. Sun-Drying (Dehydration): Removing moisture under hot sunlight prevents fungus on papads, potato chips, and red chillies.
3. Boiling: High temperature kills harmful germs in milk and drinking water.
CBSE Step-by-Step Marking Scheme
Pickling with oil/salt explained 1 M
Sun-drying explained 1 M
Boiling explained 1 M
Q7 Sprouts • Nutritious Superfood
How are sprouts prepared at home from whole moong or gram (chana)? Why are sprouts highly nutritious?
[3 Marks]
✅ Step-by-Step Solution & Working
Preparing Sprouts:
• Soak whole moong or chana in water overnight. Next morning, drain the water, wrap seeds in a wet cotton cloth, and keep in a warm place for 24 hours until tiny white shoots sprout out.
• Nutrition: Sprouting multiplies vitamins (especially Vitamin C), digestive enzymes, and makes protein easier to digest.
CBSE Step-by-Step Marking Scheme
Method of sprouting described 1.5 M
Nutritional benefit (Vitamins/enzymes) 1.5 M
Q8 Seasonal Eating • Local Produce
Why is it healthier to eat local, seasonal fruits and vegetables rather than packaged foods shipped from far away?
[3 Marks]
✅ Step-by-Step Solution & Working
Benefits of Seasonal Produce:
1. Freshly harvested local produce retains maximum vitamins, natural crunch, and aroma without preservatives.
2. Seasonal fruits provide specific nutrients suited for that weather (e.g., watermelons for summer hydration, citrus for winter immunity).
3. It reduces carbon footprint and supports regional farmers.
CBSE Step-by-Step Marking Scheme
Nutritional richness without preservatives 1.5 M
Seasonal adaptation and local farmer support 1.5 M
Q9 Food Waste Prevention • Civic Ethics
Suggest two practical ways to prevent food wastage at home and during wedding feasts.
[2 Marks]
✅ Step-by-Step Solution & Working
Preventing Food Wastage:
1. Serve smaller portions onto your plate first; take a second helping only if still hungry.
2. Donate excess untouched food from weddings and parties to verified food-rescue NGOs or community fridges.
CBSE Step-by-Step Marking Scheme
Mindful portion serving 1 M
Donation of surplus meals 1 M
Q10 Dietary Fibre • Roughage Importance
What is roughage (dietary fibre)? Which foods provide it, and why is it important for our digestion?
[2 Marks]
✅ Step-by-Step Solution & Working
Roughage:
The indigestible fibrous part of plant foods found in whole grains, oats, apples, carrots, and cucumber salads. It adds bulk to stools, keeps bowel movements regular, and prevents constipation.
CBSE Step-by-Step Marking Scheme
Sources of roughage identified 1 M
Prevention of constipation explained 1 M
Q11 Hydration • Water Requirements
Why does our body need 6 to 8 glasses of clean drinking water every day?
[2 Marks]
✅ Step-by-Step Solution & Working
Importance of Water:
1. Regulates body temperature through sweat and respiration.
2. Helps dissolve and transport nutrients to cells and flushes out metabolic toxins through urine.
CBSE Step-by-Step Marking Scheme
Temperature regulation stated 1 M
Nutrient transport and waste removal 1 M
Q12 Health Hazards • Junk Food
Why should we limit our intake of deep-fried snacks, potato chips, and aerated sugary drinks?
[2 Marks]
✅ Step-by-Step Solution & Working
Harm of Junk Food:
Junk foods contain excessive refined sugar, saturated oils, trans fats, and artificial additives. Overeating them causes childhood obesity, tooth decay, lethargy, and raises future diabetes risks.
CBSE Step-by-Step Marking Scheme
Excess sugar/oil cited 1 M
Health risks (obesity, tooth decay) 1 M
Q13 Food Safety • Expiry Dates
Why must we always check the 'FSSAI mark' and 'Best Before / Expiry Date' on packaged food packets?
[2 Marks]
✅ Step-by-Step Solution & Working
Checking Labels:
• The FSSAI mark guarantees that the food meets national safety standards.
• The Expiry Date warns consumers when chemical degradation or microbial contamination can cause food poisoning.
CBSE Step-by-Step Marking Scheme
FSSAI safety guarantee explained 1 M
Expiry date health protection explained 1 M
Q14 Cultural Cuisine • Indian Breads
Name three traditional Indian flatbreads made from grains other than wheat and state the states they belong to.
[3 Marks]
✅ Step-by-Step Solution & Working
Diverse Indian Breads:
1. Makki ki Roti: Made of maize flour in Punjab (eaten with Sarson ka Saag).
2. Bajra Roti: Made of pearl millet in Rajasthan and Gujarat.
3. Jowar Bhakri: Made of sorghum in Maharashtra and Karnataka.
CBSE Step-by-Step Marking Scheme
Three flatbreads with grains and regional states 3 M
🌟 NEP 2020 Competency-Based Case Study

Eliminating Food Wastage at Celebrations

At a school cultural festival buffet, students fill plates with heaps of food but leave half of it uneaten in trash bins.

Analytical Task: How can the student council design a 'Zero Food Waste' campaign for future school events?
Evaluation & Model Answer:
The student council can implement the 'Take What You Can Eat, Eat What You Take' policy, introduce smaller serving spoons to encourage second helpings, install a weighing scale at the disposal station to display total wasted food in kilograms, and partner with local verified food rescue NGOs to distribute untouched surplus food to community shelters.
Rubric: 1.5 Marks for portion control and behavioural nudges; 1.5 Marks for waste measurement and NGO surplus distribution.