EVS / Science

Food and Nutrition

Class 4

🎯 Learning Objectives

📖 Let Us Begin!

What did you eat for breakfast today? Was it a paratha with curd, idli with sambar, or poha with peanuts? The food we eat gives our body the energy to run, play, study, and grow. But not all foods do the same job.

Just like a car needs the right fuel to run, our body needs the right kind of food. The useful substances in food that help our body are called nutrients. Let us learn about the different nutrients and how to eat well!

The Six Types of Nutrients

Our food contains six important nutrients. Each one has a special job:

NutrientWhat It DoesFoods Rich in This Nutrient
CarbohydratesGive us energy to work, play, and study. They are our body's main fuel.Rice, roti (wheat), potatoes, sugar, bread, corn
ProteinsHelp our body grow and repair itself. They build muscles, skin, and hair.Dal, paneer, milk, eggs, fish, soybean, rajma
FatsGive us extra energy and keep our body warm. They are stored for later use.Ghee, butter, oil, nuts, cheese, coconut
VitaminsProtect us from diseases and keep our eyes, skin, and bones healthy.Fruits (orange, mango, amla), green vegetables, carrots, milk
MineralsMake our bones and teeth strong. Help our blood and nerves work properly.Milk (calcium), spinach (iron), banana (potassium), salt (iodine)
WaterHelps digest food, removes waste, and keeps our body cool.Drinking water, fruits like watermelon, cucumber, buttermilk
Think about it: Which nutrients are in a glass of milk? Milk has proteins, fats, vitamins, minerals, and water -- almost all the nutrients!

What Is a Balanced Diet?

A balanced diet is a meal that contains the right amount of all six nutrients. Eating only one type of food is not enough. We need a mix of different foods every day.

A typical balanced Indian meal might include: roti or rice (carbohydrates), dal or rajma (proteins), a little ghee or oil (fats), a vegetable sabzi and salad (vitamins and minerals), and a glass of water or buttermilk.

Eating a balanced diet helps us stay healthy, grow tall, and fight diseases.

Healthy Food vs Junk Food

Healthy FoodJunk Food
Contains many nutrientsContains mostly fat, sugar, and salt
Gives lasting energyGives quick energy but makes us tired soon
Examples: fruits, vegetables, dal, roti, milk, eggsExamples: chips, samosa (fried), cold drinks, candy, pizza, burgers
Keeps us healthy and strongCan cause obesity, tooth decay, and weakness

It is fine to eat junk food once in a while, but our daily meals should be healthy and balanced.

Think about it: If you eat only chips and cold drinks for a week, how would you feel? Would you have energy to play?

Food Preservation Methods

Food can go bad if we do not store it properly. Germs grow on food and spoil it. Food preservation means keeping food safe and fresh for a longer time. Here are some common methods:

MethodHow It WorksExample
RefrigerationKeeping food cold slows down the growth of germsMilk, vegetables, and cooked food in the fridge
DryingRemoving water from food so germs cannot growDried mango (aampapad), dried fish, raisins
PicklingAdding salt, oil, or vinegar to preserve foodMango pickle (aam ka achaar), lemon pickle
BoilingHeating food to kill germsBoiling milk before storing it
Adding sugarSugar stops germs from growingJams, murabba (sweet preserve), jellies
FreezingVery cold temperatures stop germs completelyFrozen peas, ice cream, frozen chapati dough
Think about it: Why does your grandmother make mango pickle with lots of salt and oil? It is a way to preserve mangoes for the whole year!

📝 Key Words

WordMeaning
NutrientsUseful substances in food that our body needs to stay healthy
CarbohydratesNutrients that give us energy; found in rice, roti, and potatoes
ProteinsNutrients that help our body grow and repair; found in dal, milk, and eggs
Balanced dietA meal that has the right amount of all nutrients
Junk foodFood that tastes good but has very few nutrients and too much fat or sugar
PreservationMethods used to keep food fresh for a longer time
⭐ Key Points to Remember

✏️ Practice Questions

A. Fill in the Blanks
1. give us energy and are found in rice and roti.
2. Dal, milk, and eggs are rich in , which help our body grow.
3. A meal that contains all six nutrients in the right amount is called a .
4. Mango pickle is preserved using and oil.
5. in food protect us from diseases and keep our eyes healthy.
B. Multiple Choice Questions
1. Which nutrient helps build muscles and repair the body?
(a) Carbohydrates(b) Fats(c) Proteins(d) Water
2. Which of these is a junk food?
(a) Dal and rice(b) Chips and cold drink(c) Roti and sabzi(d) Fruit salad
3. Drying food in the sun is a method of:
(a) Cooking(b) Preservation(c) Pollution(d) Evaporation
C. Short Answer Questions
1. Name the six types of nutrients found in food.
2. Give two examples each of healthy food and junk food.
3. Write three methods of food preservation with one example each.
🎨 Think and Do -- Fun Activity

My Food Plate: Write down everything you ate yesterday. Then sort each food item into the correct nutrient group in the table below.

CarbohydratesProteinsFatsVitamins and Minerals

Was your meal balanced? Write Yes or No and explain why:

Want to use this as a worksheet? Switch to the A4 printable view.

Learning Objectives
Let Us Begin!

What did you eat for breakfast today? Was it a paratha with curd, idli with sambar, or poha with peanuts? The food we eat gives our body the energy to run, play, study, and grow. But not all foods do the same job.

Just like a car needs the right fuel to run, our body needs the right kind of food. The useful substances in food that help our body are called nutrients. Let us learn about the different nutrients and how to eat well!

The Six Types of Nutrients

Our food contains six important nutrients. Each one has a special job:

NutrientWhat It DoesFoods Rich in This Nutrient
CarbohydratesGive us energy to work, play, and study. They are our body's main fuel.Rice, roti (wheat), potatoes, sugar, bread, corn
ProteinsHelp our body grow and repair itself. They build muscles, skin, and hair.Dal, paneer, milk, eggs, fish, soybean, rajma
FatsGive us extra energy and keep our body warm. They are stored for later use.Ghee, butter, oil, nuts, cheese, coconut
VitaminsProtect us from diseases and keep our eyes, skin, and bones healthy.Fruits (orange, mango, amla), green vegetables, carrots, milk
MineralsMake our bones and teeth strong. Help our blood and nerves work properly.Milk (calcium), spinach (iron), banana (potassium), salt (iodine)
WaterHelps digest food, removes waste, and keeps our body cool.Drinking water, fruits like watermelon, cucumber, buttermilk

Think about it: Which nutrients are in a glass of milk? Milk has proteins, fats, vitamins, minerals, and water -- almost all the nutrients!

What Is a Balanced Diet?

A balanced diet is a meal that contains the right amount of all six nutrients. Eating only one type of food is not enough. We need a mix of different foods every day.

A typical balanced Indian meal might include: roti or rice (carbohydrates), dal or rajma (proteins), a little ghee or oil (fats), a vegetable sabzi and salad (vitamins and minerals), and a glass of water or buttermilk.

Eating a balanced diet helps us stay healthy, grow tall, and fight diseases.

Healthy Food vs Junk Food
Healthy FoodJunk Food
Contains many nutrientsContains mostly fat, sugar, and salt
Gives lasting energyGives quick energy but makes us tired soon
Examples: fruits, vegetables, dal, roti, milk, eggsExamples: chips, samosa (fried), cold drinks, candy, pizza, burgers
Keeps us healthy and strongCan cause obesity, tooth decay, and weakness

It is fine to eat junk food once in a while, but our daily meals should be healthy and balanced.

Think about it: If you eat only chips and cold drinks for a week, how would you feel? Would you have energy to play?

Key Words and Meanings
WordMeaning
NutrientsUseful substances in food that our body needs to stay healthy
CarbohydratesNutrients that give us energy; found in rice, roti, and potatoes
ProteinsNutrients that help our body grow and repair; found in dal, milk, and eggs
Balanced dietA meal that has the right amount of all nutrients
Junk foodFood that tastes good but has very few nutrients and too much fat or sugar
PreservationMethods used to keep food fresh for a longer time
Food Preservation Methods

Food can go bad if we do not store it properly. Germs grow on food and spoil it. Food preservation means keeping food safe and fresh for a longer time. Here are some common methods:

MethodHow It WorksExample
RefrigerationKeeping food cold slows down the growth of germsMilk, vegetables, and cooked food in the fridge
DryingRemoving water from food so germs cannot growDried mango (aampapad), dried fish, raisins
PicklingAdding salt, oil, or vinegar to preserve foodMango pickle (aam ka achaar), lemon pickle
BoilingHeating food to kill germsBoiling milk before storing it
Adding sugarSugar stops germs from growingJams, murabba (sweet preserve), jellies
FreezingVery cold temperatures stop germs completelyFrozen peas, ice cream, frozen chapati dough

Think about it: Why does your grandmother make mango pickle with lots of salt and oil? It is a way to preserve mangoes for the whole year!

Examples from Daily Life
Example 1: A Balanced School Lunch

Meera's mother packs her lunch box with two rotis (carbohydrates), dal (protein), a spoon of ghee (fat), carrot and cucumber slices (vitamins and minerals), and a small bottle of water. This is a balanced meal that gives Meera energy for the whole school day.

Example 2: The Mid-Day Meal Scheme

In many government schools across India, children get a free mid-day meal. This meal usually includes rice or roti, dal, and a vegetable. The scheme helps children get proper nutrition so they can study and grow well.

Example 3: Drying Food in Rajasthan

In Rajasthan, where water is scarce, people dry vegetables like sangri (desert beans) and ker (wild berries) in the hot sun. These dried foods can be stored for months and cooked when fresh vegetables are not available.

Key Points to Remember
Practice Questions

A. Fill in the Blanks

  1. give us energy and are found in rice and roti.
  2. Dal, milk, and eggs are rich in , which help our body grow.
  3. A meal that contains all six nutrients in the right amount is called a .
  4. Mango pickle is preserved using and oil.
  5. in food protect us from diseases and keep our eyes healthy.

B. Multiple Choice Questions

  1. Which nutrient helps build muscles and repair the body?
    (a) Carbohydrates(b) Fats(c) Proteins(d) Water
  2. Which of these is a junk food?
    (a) Dal and rice(b) Chips and cold drink(c) Roti and sabzi(d) Fruit salad
  3. Drying food in the sun is a method of:
    (a) Cooking(b) Preservation(c) Pollution(d) Evaporation

C. Short Answer Questions

  1. Name the six types of nutrients found in food.
  2. Give two examples each of healthy food and junk food.
  3. Write three methods of food preservation with one example each.
Think and Do -- Fun Activity

My Food Plate: Write down everything you ate yesterday. Then sort each food item into the correct nutrient group in the table below.

CarbohydratesProteinsFatsVitamins and Minerals

Was your meal balanced? Write Yes or No and explain why: