What Really Goes Into the Food on Your Plate?

People in different regions of India eat a variety of foods, each made from different ingredients found locally. For example, in the south, people often eat idli and dosa, which are made from rice and urad dal (black gram), while in Punjab, chapati and dal are common, made from wheat and lentils. These dishes use ingredients that grow well in their regions. This article covers the variety of Indian foods, the ingredients used to make them, and how to identify their sources, as required by the CBSE Class 6 Science Chapter 3 syllabus. You will also learn how to classify food sources as plant or animal in origin and identify the edible parts of plants.

To identify the ingredients and sources of a common Indian dish, start by listing everything that goes into making it, then find out whether each ingredient comes from a plant or an animal. For example, to make khichdi, you need rice, dal (lentils), salt, water, and sometimes vegetables and ghee. Rice and dal come from plants, salt is a mineral, vegetables are plant parts, and ghee is made from animal milk. By checking each ingredient, you can classify its source. In real life, when you eat poha, the main ingredient is flattened rice (from the rice plant), with peanuts (from a plant), onions (a plant root), and sometimes curd (from animal milk). Many students think all food comes only from plants, but animal products like milk, eggs, and meat are also important sources.

Foods can be classified as coming from plants or animals by identifying their origin. Plant foods can be further grouped by the part of the plant we eat: roots (like carrot), stems (like sugarcane), leaves (like spinach), flowers (like cauliflower), fruits (like mango), and seeds (like wheat or rice). Animal foods include milk, eggs, meat, and fish. For example, when you eat aloo (potato) curry, the potato is a stem, while in palak paneer, palak (spinach) is a leaf and paneer is made from animal milk. It is a common mistake to think that all seeds are grains; some seeds, like beans and peas, are eaten whole, while others, like mustard, are used for oil.

The major nutrients found in food are carbohydrates, proteins, fats, vitamins, minerals, dietary fibre, and water. Carbohydrates provide energy, proteins help build and repair body tissues, fats store energy and keep the body warm, vitamins and minerals protect against diseases and keep the body healthy, dietary fibre helps in digestion, and water is essential for all body processes. For example, rice and wheat are rich in carbohydrates, pulses and milk have proteins, oils and butter have fats, fruits and vegetables provide vitamins and minerals, and whole grains supply dietary fibre. Many students confuse vitamins and minerals as the same, but they are different: vitamins are organic substances, while minerals are inorganic.

Simple food tests help identify the presence of starch, protein, and fat in food items. To test for starch, add a few drops of iodine solution to the food; a blue-black colour shows starch is present. For protein, mix the food with a little water, add a few drops of copper sulphate solution and then caustic soda solution; a violet or purple colour indicates protein. To test for fat, rub the food on a piece of paper; a translucent, oily patch means fat is present. For example, if you test a piece of bread with iodine, it turns blue-black, showing it contains starch. Many students forget to add both copper sulphate and caustic soda when testing for protein, which is necessary for the correct result.