Food: Where Does It Come From? (Class 6 Science) — Sources of Food in Daily Life

Food you eat does not appear by itself—it comes from living things around you and from processes that help those living things grow or stay fresh. In Class 6, you learn to trace food to two broad sources: plants and animals, and understand how humans get and prepare it safely for energy and growth.

1) Two Main Sources of Food: Plants and Animals

Most of the food on our plates can be traced back to plants and animals. Plants mainly provide things like grains, fruits, vegetables, sugar, and oil. Animals provide milk, eggs, and meat, and many animal products come from plants indirectly because animals eat plants.

Think of your plate as a chain: a plant uses sunlight and water to make food (like starches). Then humans eat the plant directly, or they eat an animal that had eaten plants. So even animal-based food often starts with plants.

• Plant-based foods: rice, wheat, pulses, fruits, vegetables, groundnut oil
• Animal-based foods: milk, curd, eggs, fish, chicken
• Fats and oils: many oils come from plants; some fats come from animals

2) Plant Foods: What Parts of Plants We Eat

Plants have different parts: roots, stems, leaves, flowers, fruits, and seeds. Many of these parts can become food for humans, depending on the crop. This is why the same plant family can give different edible parts.

For example, the “bulb” in onions is actually a modified stem, while carrots are roots. Knowing the edible part helps you understand why different foods grow in different ways.

• Roots: carrot, radish, beetroot
• Stems: sugarcane (and a few other plants), ginger (a modified stem)
• Leaves: spinach, spinach-like leafy vegetables
• Flowers: cauliflower is a flower part (also includes edible “curds”)
• Fruits: mango, apple (apple is a fruit), banana
• Seeds/Grains: wheat, rice, maize (corn), dals (pulses)

Exam tip: When asked “where does this food come from,” always link it to the plant part—grain is a seed, tomato is a fruit, and so on.

3) Animal Foods: How Animals Become Part of Our Diet

Animals provide food that comes from their bodies. But animals must eat and live; they do not create food from “nothing.” For most animals that humans eat, their food comes from plants (directly or indirectly).

For instance, cows eat grass and other plants; the cow’s milk becomes our food. This shows the food relationship: plants → animals → humans.

• Milk: from dairy animals like cows and buffaloes
• Eggs: from hens (birds)
• Meat and fish: from animals caught or raised for food

Important idea: Human diet can include plant and animal foods, but in all cases, the main source of energy in the chain begins with plants.

4) Getting Food from Sources: Farming, Fishing, and Collection

Once we know the source (plants/animals), we can understand how food reaches people. Food comes through activities like farming, fishing, and sometimes collecting from forests or gardens.

Farming usually involves growing crops carefully: sowing seeds, giving water, protecting from pests, and harvesting. Fishing involves catching fish and other sea/lake animals, usually in a sustainable way. Collection may include edible fruits, leaves, or other plant materials found naturally.

• Farming: growing crops on land (rice, wheat, pulses, vegetables)
• Horticulture: growing fruits and many garden plants
• Fishery: obtaining fish from water bodies
• Collection: gathering some wild or forest produce (with rules for safety and conservation)

Exam tip: If a question asks “how food is obtained,” you should mention the activity (farming/fishing/collection), not just the source (plant/animal).

5) Fresh vs Stored Food: Preservation and Safety

Food is perishable. If we keep food for long without protection, it can spoil. To prevent spoilage, we use storage and preservation methods that slow down changes caused by microbes and air.

Different foods need different methods. Drying removes water; pickling adds acid/salt; refrigeration slows microbial growth; sealing reduces contact with air.

• Drying: makes grains and some fruits last longer
• Salting/pickling: uses salt/acid to slow spoilage
• Refrigeration/freezing: slows microbial activity
• Sealing and airtight storage: reduces moisture and air exposure

Key concept for understanding: Preservation does not “create” food; it simply helps keep food safe for a longer time.

6) Worked Reasoning: Tracing “Where Food Comes From”

To avoid memorizing only examples, practice tracing food as a chain. Here are two quick reasoning patterns you can use in exams.

Pattern A: Plant item → direct plant source
Example: “Where does rice come from?” Rice is a seed/grain of the plant. Humans grow the crop and harvest the seeds.

Pattern B: Animal item → animal source, but energy starts with plants
Example: “Where does milk come from?” Milk comes from a cow. But a cow gets its food from plants (grass/hay). So the energy chain is plants → cow → milk → humans.

Quick mini-logic (numerical style): Suppose 1 kg of plant feed produces about 0.3 kg of milk (an approximate ratio; in real life it varies). Then plant feed needed is 1 ÷ 0.3 = 3.33 kg for 1 kg milk. This shows why animal foods depend on plant foods.

Exam relevance: You may not be given exact numbers in your CBSE questions, but the logic of “food chain starts with plants” is always correct.

Key takeaways

• Most food comes from two broad sources: plants and animals; animal food often depends on plants for its start.
• Different parts of plants—roots, stems, leaves, flowers, fruits, seeds—can become different foods.
• Milk, eggs, and meat are animal-based foods, but animals get energy from what they eat (usually plants).
• Food reaches us through farming, fishing, and collection; knowing the method helps answer “how it is obtained.”
• Food is stored and preserved to prevent spoilage by slowing microbial growth and reducing air/moisture exposure.
• When in doubt, trace the chain: plants make food → humans eat plants or animals → humans get final food.

Test yourself