Food and Nutrition

Overview

Food and Nutrition is a core topic within Environmental Studies for MAHA TET Paper I, directly connecting science concepts with everyday life experiences of primary-level children. This topic tests your understanding of what constitutes food, the types of nutrients present in different foods, the concept of a balanced diet, and the health consequences when nutrition is inadequate.

For the exam, expect questions that require you to identify nutrient sources, match deficiency diseases with their causes, and apply knowledge of balanced diet principles to practical scenarios. Questions often present food items and ask which nutrient they primarily provide, or describe symptoms and ask you to identify the deficiency disease. Understanding this topic also helps in pedagogy questions about teaching nutrition through activity-based learning.

Mastery requires memorising specific nutrient-food associations, deficiency disease names with their symptoms, and understanding why a balanced diet matters for growing children. The topic integrates well with health and hygiene concepts in the EVS syllabus.

Key Concepts

• **Food** is any substance consumed to provide nutritional support for the body, supplying energy, enabling growth, and maintaining body functions.

• **Nutrients** are chemical substances in food that the body uses for energy, growth, repair and regulation. There are six main categories: carbohydrates, proteins, fats, vitamins, minerals and water.

• **Macronutrients** (carbohydrates, proteins, fats) are needed in large quantities and provide energy measured in calories or kilocalories.

• **Micronutrients** (vitamins and minerals) are needed in small quantities but are essential for preventing diseases and maintaining health.

• **Balanced diet** contains all nutrients in correct proportions according to age, gender, activity level and physiological condition (like pregnancy or illness).

• **Deficiency diseases** occur when the body lacks a specific nutrient over a prolonged period, causing characteristic symptoms.

• **Protective foods** (fruits, vegetables) provide vitamins and minerals; **energy-giving foods** (cereals, fats) provide calories; **body-building foods** (pulses, eggs, milk) provide proteins.

• **Water** is essential for digestion, absorption, circulation, temperature regulation and waste removal — humans need approximately 2-3 litres daily.

Formulas / Key Facts

| Nutrient | Main Function | Rich Sources | |----------|---------------|--------------| | Carbohydrates | Provide energy | Rice, wheat, potato, sugar, bread | | Proteins | Body building and repair | Pulses, eggs, milk, fish, meat, soybean | | Fats | Store energy, insulation | Ghee, butter, oil, nuts, cheese | | Vitamin A | Healthy eyes and skin | Carrot, papaya, mango, liver, milk | | Vitamin B complex | Metabolism, nerve function | Whole grains, eggs, green vegetables | | Vitamin C | Immunity, wound healing | Amla, orange, lemon, guava, tomato | | Vitamin D | Bone and teeth formation | Sunlight, fish, egg yolk, fortified milk | | Calcium | Strong bones and teeth | Milk, cheese, green leafy vegetables | | Iron | Haemoglobin formation | Spinach, jaggery, apple, liver, dates | | Iodine | Thyroid function | Iodised salt, seafood |