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Science: Class 6 — Chapter 3: Mindful Eating: A Path to a Healthy Body

3.1 Food Diversity and Culinary Practices

3.1.1 Regional Food Diversity
  • Regional Variation: Food choices across India depend on locally grown crops, climate, soil, and cultural traditions.
  • Punjab: Major crops are wheat and maize; traditional foods include Makki di roti, Sarson da saag, and Lassi.
  • Karnataka: Major crops are rice, ragi, and coconut; traditional foods include Idli, Dosa, Sambhar, and Ragi mudde.
  • Manipur: Major crops are rice and bamboo; traditional foods include Eromba and Singju.

3.1.2 Evolution of Cooking Practices
  • Traditional Tools: Cooking was historically done on a chulha (traditional stove) and grinding with a sil-batta (stone grinder).
  • Modern Tools: Replaced by gas/induction stoves and electrical grinders for efficiency and ease.
3.2 Components of Food (Nutrients)

3.2.1 Major Nutrients
  • Nutrients: Chemical components in food required for energy, growth, repair, and protection.
  • Carbohydrates: Primary source of instant energy. Found in wheat, rice, maize, potatoes, and sugar.
  • Fats: High-energy storage source that keeps the body warm. Found in ghee, butter, oil, nuts, and seeds.
  • Proteins: Body-building nutrients essential for growth and tissue repair. Found in pulses, milk, paneer, eggs, fish, and meat.
  • Vitamins & Minerals: Protective nutrients required in small quantities to prevent diseases.

3.2.2 Deficiency Diseases and Sources
  • Vitamin A: Maintains healthy eyes and skin. Sources: Carrot, papaya, milk. Deficiency causes Loss of Vision (Night Blindness).
  • Vitamin B1: Supports heart and nerve functions. Sources: Whole grains, nuts. Deficiency causes Beriberi.
  • Vitamin C: Helps fight diseases. Sources: Citrus fruits (lemon, orange, amla). Deficiency causes Scurvy (bleeding gums).
  • Vitamin D: Aids calcium absorption for bones. Sources: Sunlight, milk, eggs. Deficiency causes Rickets (soft bones).
  • Calcium: Essential for strong bones and teeth. Sources: Milk, cheese. Deficiency causes Bone and Tooth Decay.
  • Iodine: Required for physical and mental growth. Sources: Iodised salt, seafood. Deficiency causes Goitre (swollen neck).
  • Iron: Essential component of blood (haemoglobin). Sources: Green leafy vegetables, beetroot. Deficiency causes Anaemia (weakness).

3.2.3 Dietary Fibres and Water
  • Roughage (Dietary Fibres): Plant-based fibres that do not provide nutrients but assist in digestion and smooth bowel movement.
  • Water: Helps the body absorb nutrients and flush out wastes as sweat and urine.
3.3 Testing Food Components

3.3.1 Chemical Tests
  • Starch Test: Add 2-3 drops of diluted iodine solution to the food. A blue-black colour indicates starch presence.
  • Fat Test: Rub food on a clean sheet of paper. An oily translucent patch indicates fat presence.
  • Protein Test: Mash food, add water, then add 2 drops of copper sulfate and 10 drops of caustic soda. A violet colour indicates protein presence.
3.4 Balanced Diet and Millets

3.4.1 Balanced Diet vs Junk Food
  • Balanced Diet: A diet containing all essential nutrients, roughage, and water in correct proportions for optimal health.
  • Junk Food: Foods high in calories, fats, and sugars but extremely low in essential nutrients. Leads to obesity and health issues.

3.4.2 Millets (Nutri-cereals)
  • Millets: Small-grained native crops (e.g., Jowar, Bajra, Ragi, Sanwa) that are highly nutritious, climate-resilient, and rich in minerals and fibres.
3.5 Food Miles

3.5.1 Concept of Food Miles
  • Food Miles: The total distance food travels from the farm (producer) to the plate (consumer).
  • Environmental Impact: Lower food miles reduce transport costs, pollution, and carbon footprint while supporting local farmers.