Foods We Eat

What are sources of food?
Sources of food are the places from where we get the things we eat. For Class 3, the two main sources are plants and animals.

1. Foods from plants

• Plants give us many different foods. Different parts of a plant are eaten:
• Seeds / grains: rice, wheat, maize, millets
• Roots: carrot, beetroot, radish, sweet potato
• Stems: sugarcane, potato (tuber), bamboo shoot)
• Leaves: spinach, methi, lettuce
• Fruits: mango, banana, apple, tomato
• Flowers: cauliflower, broccoli
• Oilseeds & pulses: groundnut, mustard, gram, lentils
• Plants use sunlight, water and air to make their own food in the leaves. This is called photosynthesis (explained simply below).

2. Foods from animals

• Animals also give us many foods:
• Milk and milk products: milk, curd, paneer, butter
• Eggs: from hens and some other birds
• Meat: chicken, mutton, beef (depending on culture)
• Fish: from rivers and seas
• Honey: from bees

3. Simple idea of how plants make food

Leaves take water from the soil and carbon dioxide from the air, and with the help of sunlight make food. We can write this simply as:

Sunlight + Water + Air (carbon dioxide) → Food (in leaves) + Oxygen

4. Why we need different kinds of food

• No single food gives all the things our body needs. We must eat a variety: cereals for energy, fruits and vegetables for vitamins, pulses and milk for protein, and some fats and oils.
• Eating a balanced meal helps us grow, gives us energy and keeps us healthy.

5. Good habits

• Wash fruits and vegetables before eating.
• Cook meat and eggs properly.
• Eat fresh and seasonal foods when possible.

Summary: Most of our food comes from plants and animals. Plants provide cereals, fruits, vegetables, pulses and oils. Animals provide milk, eggs, meat, fish and honey. Eating different types of foods keeps us healthy.

What are Plant Foods?
Plant foods are the edible parts of plants that we eat. They include roots, stems, leaves, flowers, fruits and seeds. Plant foods give us energy, vitamins, minerals, fibre and help us grow healthy and strong.

Why are plant foods important?

• Provide vitamins (for example, vitamin C in citrus fruits) and minerals (for example, iron in spinach).
• Give fibre that helps digestion (for example, whole grains, fruits).
• Are often low in unhealthy fats and help keep us fit.

Types of plant foods (parts of the plant we eat)

• Roots: grow under the soil. Examples: carrot, beetroot, radish, sweet potato.
• Stems: the plant’s main support. Examples: potato (tuber), sugarcane, asparagus.
• Leaves: green parts that make food for plants. Examples: spinach, lettuce, fenugreek (methi).
• Flowers: the bloom of the plant. Examples: cauliflower, broccoli, banana flower.
• Fruits: contain seeds and develop from flowers. Examples: mango, apple, tomato, banana.
• Seeds/Grains: tiny parts that can grow into new plants. Examples: rice, wheat, maize, peas, beans, almonds.

How to use plant foods in daily life

• Eat different colours of fruits and vegetables to get different nutrients.
• Include a mix of grains (rice, wheat), pulses (beans, dal), vegetables and fruits in meals.
• Store fruits and vegetables properly (cool, dry place or refrigerator for some) and wash before eating.

Simple classroom activities

• Bring samples (carrot, potato, spinach, apple) and ask children to sort by plant part eaten.
• Draw a plate and colour half with vegetables/fruits to show a healthy meal.
• Plant a seed and observe which part becomes edible.

What are Animal Foods?

Animal foods are foods that come from animals. These include milk and milk products (like curd, butter, cheese), eggs, meat, fish, honey and products made from them. People get these foods by rearing animals, catching fish, or collecting products (for example, collecting honey from beehives).

Why do we eat animal foods?

• They give important nutrients such as protein (helps body grow and repair), calcium (helps make strong bones and teeth), and fats (gives energy).
• Some animal foods (like milk and eggs) are used to make other foods such as paneer, cake, curd and butter.

How do we get common animal foods?

• Milk: From cows, buffaloes, goats — used to make curd, butter, cheese, paneer.
• Eggs: From chickens (and other birds).
• Meat: From animals like goat, sheep, chicken (must be grown and cooked safely).
• Fish: Caught from rivers, lakes and seas.
• Honey: Collected from beehives.

Food safety and care

• Always wash hands before eating and make sure animal foods are clean and cooked well (for meat and fish).
• Drink boiled or pasteurised milk to avoid germs.
• Keep foods covered so flies and dust do not spoil them.

Everyday examples of how we use animal foods

• Milk for drinking and making tea, curd or paneer.
• Eggs for breakfast (boiled or omelette) and in cakes.
• Fish or chicken cooked for main meals.
• Honey as a sweetener in small amounts.

Notes for children

Animal foods are part of a balanced diet together with plant foods (fruits, vegetables, grains). We should eat different kinds of foods to stay healthy and strong.

Plants have many parts — roots, stems, leaves, flowers, fruits and seeds — and we eat different foods that come from these parts. This topic explains which part of the plant we eat, why that part is useful, and what nutrients it usually gives us.

• Roots: Roots grow under the soil and often store food for the plant. Edible roots (like carrots and radishes) are rich in carbohydrates and some vitamins. They are crunchy and used raw or cooked.
• Stems: Stems support the plant and carry water and food. Some stems are edible (e.g., sugarcane, asparagus). Stems may be juicy or fibrous and often give energy (sugars) or fibre.
• Leaves: Leaves make food for the plant by photosynthesis. Edible leaves (spinach, lettuce) are rich in vitamins, minerals, and fibre and are good for health.
• Flowers: Some flowers are eaten (cauliflower, broccoli). Flowers can be nutritious and tasty when cooked or used in salads.
• Fruits: Fruits develop from flowers and usually contain seeds. We eat fruits (mango, apple, tomato) for vitamins, natural sugar and fiber.
• Seeds: Seeds (peas, beans, corn, nuts) are the baby plants and are rich in protein, fats, and carbohydrates. They are important for growth and energy.
• Tubers and Bulbs (modified stems or roots): Potatoes are tubers (store starch) and onions are bulbs. These store a lot of energy and are used in many dishes.

Why does it matter? Knowing which part we eat helps us learn about where our food comes from and what nutrients it gives. For example, roots and tubers provide energy (carbohydrates), leaves give vitamins and minerals, seeds provide proteins and fats, and fruits give vitamins and natural sugars.

Simple classroom activity: Collect pictures of foods and ask students to paste them under headings: Roots, Stems, Leaves, Flowers, Fruits, Seeds. Discuss what nutrients each group gives.

Key scientific idea (simple photosynthesis): Leaves use sunlight to make food for the plant. Word form: Carbon dioxide + Water + Sunlight → Glucose (plant sugar) + Oxygen.

What are Food Groups? Food groups are categories of foods that have similar nutrients and help our body in particular ways. Eating from different food groups gives us the energy and materials needed to grow, play and stay healthy.

Main Food Groups

• Cereals and Grains: Rice, wheat, millet, bread — give energy (carbohydrates).
• Pulses and Proteins: Lentils, beans, peas, eggs, fish, meat, paneer — build and repair our body (proteins).
• Milk and Dairy: Milk, curd, cheese — good for strong bones and teeth (calcium, protein).
• Vegetables: Spinach, carrot, tomato — provide vitamins, minerals and fiber.
• Fruits: Apple, banana, orange — provide vitamins (like vitamin C), minerals and natural sugar.
• Fats and Oils: Ghee, oil, butter — give concentrated energy and help absorb some vitamins.
• Sugars and Sweets: Jaggery, candy — give quick energy but eat in small amounts.

What are Nutrients? Nutrients are the useful parts of food that our body uses. The main nutrients are:

• Carbohydrates: Main source of energy for play and study. Found in rice, chapati, potato, bread.
• Proteins: Help us grow and repair muscles and body parts. Found in dal, eggs, meat, milk.
• Fats: Give energy and keep us warm. Found in ghee, butter, oil, nuts.
• Vitamins: Help keep body working well (like vitamin A for eyes, vitamin C for immunity). Found in fruits and vegetables.
• Minerals: Like calcium for bones and iron for blood. Found in milk (calcium), spinach and jaggery (iron).
• Fiber (Roughage): Keeps our stomach healthy and prevents constipation. Found in whole grains, fruits and vegetables.
• Water: Needed for all body processes; keeps us hydrated.

Balanced Diet

A balanced diet has the right amount of food from each group every day. A simple way to remember: half the plate should be fruits and vegetables, one quarter cereals (rice/chapati), and one quarter proteins (dal, egg, paneer). Add a little milk and a small amount of fats and sweets.

Why this matters for Class 3 children

• Gives energy for studies and play.
• Helps you grow taller and stronger.
• Keeps you free from frequent sickness.

Practical Tips

• Have a healthy breakfast every day (poha/upma/porridge with milk).
• Eat colorful vegetables and fruits — different colors mean different vitamins.
• Drink plenty of water and have milk daily.
• Limit sweets and fried snacks; enjoy them sometimes only.

A balanced diet means eating different kinds of foods in the right amounts so our body gets all the nutrients it needs to grow, play and stay healthy. Important nutrients are:

• Carbohydrates: give energy (rice, chapati, bread, potatoes).
• Proteins: help build and repair the body (dal, eggs, paneer, chicken, fish).
• Fats: give energy and keep us warm (oil, ghee, butter, nuts).
• Vitamins and Minerals: keep eyes, teeth, bones and immunity strong (fruits, vegetables, milk).
• Fibre: helps digestion (vegetables, fruits, whole grains).
• Water: keeps the body working well and prevents dehydration.

For a Class 3 child, a simple way to remember a balanced meal is: half the plate should be fruits and vegetables, one quarter whole grains, and one quarter proteins with a little healthy fat and a glass of milk or water. Signs of an unbalanced diet can be constant tiredness, getting sick often, not growing well or stomach problems. Good habits include eating at regular times, trying many foods, and drinking enough water.

What are food habits? Food habits are the ways in which people choose, prepare and eat food every day. These habits depend on taste, culture, religion, what is available nearby, family traditions and health needs.

Why do we need food? Food gives us energy to play and study, helps our body grow and keeps us healthy. Different types of food give different nutrients: carbohydrates for energy, proteins for growth and repair, fats for energy and warmth, vitamins and minerals for body functions, and water.

Types of foods

• Cereals and grains (rice, wheat, bread) — give energy.
• Vegetables and fruits — give vitamins and minerals and fibre.
• Proteins (dal, paneer, eggs, fish, chicken) — build and repair the body.
• Dairy (milk, curd) — give calcium for strong bones and teeth.
• Oils and fats — small amount for energy.

Meals of the day and healthy habits

• Breakfast: first meal after waking up — should be healthy (milk, fruit, cereal or roti).
• Lunch: mid-day main meal — include grains, vegetables and protein.
• Dinner: evening meal — lighter than lunch but balanced.
• Snacks: eat healthy snacks like fruit, nuts or milk; avoid too many chips and sweets.
• Healthy habits: wash hands before eating, eat at regular times, chew food well, eat a variety of foods and drink plenty of water.

Balanced meal idea A balanced meal has foods from different groups: cereals + protein + vegetables + fruit + milk. It keeps us active and prevents sickness.

Cultural and seasonal variety Different families and regions eat different foods (for example, south India often has rice; north India often has roti). Seasonal foods (mangoes in summer, oranges in winter) are fresh and healthy.

Eat smart Enjoy homemade foods, try colorful plates (vegetables and fruits) and limit fried and very sugary foods.

What is energy from food?
Food is the fuel for our body. When we eat, the body breaks down food and releases energy. This energy helps us move, grow, think and keep warm. Energy from food is what makes our muscles work and our heart beat.

What is work?
In everyday life, work means any activity where we use our body to do something — walking, lifting a book, running or playing. All these activities need energy from the food we eat.

How food gives energy (simple steps)

1. We eat food (like roti, rice, fruits, milk).
2. The body digests food and changes it into smaller parts (sugars, fats, proteins).
3. The body’s cells use these parts to produce energy.
4. This energy is used for activities (work) and for growing and staying healthy.

Healthy tip: A balanced diet with grains, vegetables, fruits, milk and pulses gives steady energy for study and play.

What is food preparation and cooking? Food preparation means the simple steps we do before we eat food — washing, peeling, cutting, mixing. Cooking means using heat to change raw ingredients into tasty, safe food — for example, boiling, frying, steaming or baking.

Why it is important

• Makes food safe by killing germs.
• Makes food tasty and easier to chew and digest.
• Helps mix ingredients from different food groups to give balanced meals.

Common steps in food preparation

1. Clean: Wash hands, vegetables, fruits and utensils.
2. Peel and cut: Remove skin and cut into pieces suitable for cooking or eating.
3. Measure and mix: Use bowls, spoons or cups to add right amounts of ingredients.
4. Cook: Apply heat by boiling, steaming, frying, roasting, or baking.
5. Serve and store: Keep cooked food covered and refrigerate leftovers.

Simple cooking methods (with what happens)

• Boiling - food cooks in hot water. Good for rice, pasta, dal and vegetables.
• Steaming - food cooks in steam and keeps nutrients. Good for idli, momos and some vegetables.
• Frying - food cooks in hot oil and becomes crisp. Used for pakoras, omelettes and parathas.
• Baking/Roasting - food cooks in dry heat (oven or tandoor). Used for cakes, bread and roasted vegetables.

Hygiene and safety tips

• Always wash hands before cooking.
• Use clean cutting boards and utensils; keep raw and cooked foods separate.
• Cook food fully (no raw inside) and taste carefully for salt and spices.
• Be careful with hot utensils and oil to avoid burns.

Healthy cooking ideas for Class 3 children

• Make a fruit salad: wash, cut fruits and mix — no cooking needed.
• Help knead chapati dough and roll small rotis (with adult supervision for cooking).
• Mix pulses for a simple dal and watch it boil until soft.

Cleanliness and food safety mean keeping food, the place where we cook and eat, and our hands and plates clean so that we do not get sick. Germs like bacteria and viruses live on dirty hands, unwashed fruits, uncovered food and dirty utensils. When these germs get into our food, they can make our stomach hurt or give us diarrhoea and fever.

Why it is important:

• Clean food keeps us healthy and strong.
• Clean cooking and eating places stop germs from spreading.
• Safe food prevents stomach problems and helps children grow well.

Simple steps to keep food safe:

• Wash hands with soap and water before cooking and before eating. Wash after using the toilet and after playing outside.
• Wash fruits and vegetables under clean running water before eating or cooking them.
• Cook food well—make sure it is hot all the way through. Hot food kills many germs.
• Cover food so flies and dust do not get on it. Keep food in clean containers.
• Store milk and cooked food in the refrigerator if you are not eating them right away. Don’t leave cooked food outside for many hours.
• Use clean plates, spoons and bowls. Wash them with soap and hot water.
• Throw away food that smells bad, looks mouldy, or tastes strange. When in doubt, do not eat it.
• Drink clean water. Boil or filter water if it is not safe.

Signs that food may be unsafe: bad smell, change in colour, mould, bubbles in milk, or stomach pain after eating. If you see any of these signs, tell an adult and do not eat the food.

Remember: keeping things clean and following these simple rules helps everyone stay healthy and enjoy tasty food safely.

What is storage of food? Storage of food means keeping food safely after we buy or cook it so that it stays good to eat for a longer time. Good storage keeps food fresh, stops waste, and keeps us healthy.

Why food spoils

• Microorganisms (bacteria, moulds, yeast) grow on food and make it spoil.
• Moisture (water) helps microbes grow and makes food go bad faster.
• Air (oxygen) and light can change the color and taste and help spoilage.
• Warm temperature speeds up spoilage; cool temperature slows it down.
• Insects and rodents can spoil food by eating or contaminating it.

Ways to store food

• Dry storage: Keep rice, flour, spices, and dry pulses in clean, dry, airtight containers away from moisture and sunlight.
• Refrigeration: Keep milk, curd, vegetables, fruits, and cooked food in the refrigerator to slow down spoilage.
• Freezing: Frozen foods (meat, peas, ice cream) stay good for a long time in a freezer because very low temperatures stop microbes.
• Pickling and salting: Using salt, sugar or vinegar (pickles, jams) preserves food by making it hard for microbes to grow.
• Drying (sun-drying or dehydrating): Removing water from food (dry mango, dried fish) prevents spoilage.
• Airtight packing: Keeps air and moisture away from biscuits, chips and spices so they stay crisp and fresh.
• Kitchen hygiene and rotation: Keep storage places clean; use older food first (first-in, first-out).

How to tell food has spoiled

• Bad smell, change in color, slimy texture or visible mould.
• Unusual taste — do not taste if it looks or smells wrong.

Simple safety tips for children and families

• Keep cooked food covered and refrigerate if not eaten soon.
• Store raw and cooked foods separately to avoid contamination.
• Keep dry items in airtight containers and store in a cool, dry place.
• Clean the fridge regularly and throw away food that is spoiled.
• Use labels with date to know which food to use first.

What are changes in food? Changes in food are any visible or invisible differences that happen to food items. These changes can be brought about by cutting, heating, cooling, letting fruit ripen, or by tiny living things called microbes.

Two main kinds of changes

• Physical changes: The food looks different but its nature is the same. These can often be reversed. Examples: cutting, crushing, melting, freezing. (e.g., ice melts to water and water can freeze back to ice.)
• Chemical changes: The food changes into something new and cannot easily go back to the original form. These are usually caused by heat, air, or microbes. Examples: cooking, ripening, curdling, and rotting.

Reversible vs Irreversible

• Reversible: Changes that can be undone (freezing and then thawing water).
• Irreversible: Changes that cannot be undone (raw egg becomes a cooked omelette).

Why do these changes happen? Heat can change the colour, taste and texture (cooking). Time and natural processes change taste and softness (ripening). Microbes can make food spoil and smell bad (rotting) or make curd from milk (fermentation/curdling).

Simple safety note: Some changes (like rotting) make food unsafe to eat. Always check food for bad smell, colour or texture before eating.

Animals, like humans, need food to grow, move and stay healthy. Different animals eat different types of food. We group animals by the food they eat:

• Herbivores eat plants only (for example: cows, goats, deer).
• Carnivores eat other animals (for example: lions, eagles, snakes).
• Omnivores eat both plants and animals (for example: dogs, crows, humans).
• Scavengers feed on dead animals (for example: vultures).

Animals have body parts and behaviours that help them eat the right food: teeth (sharp teeth for carnivores, flat teeth for herbivores), beaks in birds, long necks in giraffes to reach leaves, and special stomachs in cows that help them digest grass (they chew cud).

Food for animals can be natural (grass, leaves, fruits, insects, other animals) or given by people (hay, grains, milk, pellets, kitchen scraps). Farmers and pet owners give the right kind and amount of food at regular times. Clean water is also part of an animal’s food needs.

Food chains show how energy moves from plants to animals. Example: Sun → Grass → Goat → Wolf. Only a small part of energy (about 10%) passes from one level to the next, so higher-level animals need to eat more food from lower levels.

Good practices: feed appropriate food for the animal, keep food clean, do not give harmful human food (for example, chocolate is dangerous for dogs), and avoid overfeeding or underfeeding.

What are seasonal foods? Seasonal foods are fruits, vegetables and other foods that grow best at a particular time of the year. For example, mangoes grow in summer and citrus fruits like oranges grow in winter.

What is local produce? Local produce is food grown or made near where you live — from nearby farms, gardens, dairies or fisheries. It reaches the market quickly, so it is fresher.

Why choose seasonal and local foods?

• Fresher and tastier: They are picked when ready and eaten soon, so they keep more vitamins and flavour.
• Cheaper: When many people grow the same food in its season, the price falls.
• Good for farmers and community: Buying local helps nearby farmers earn a living.
• Environment friendly: Local food travels less, so there is less pollution from transport.

How seasons affect food: Different plants need different weather. Hot weather helps some fruits ripen, cool weather helps root vegetables and citrus fruits grow well. Farmers plant and harvest according to the season.

Simple activities for children: Visit a local market and ask where food comes from, make a small seasonal chart, or grow a seasonal vegetable at home.