Diversity of Living Organisms
NCERT EVS introduces the diversity of living things through direct, sensory experience: walks in the school garden, observation of insects on the playground, listening to bird calls, drawing leaves from different trees. The Class III chapter 'A Day with Nandu', Class IV's 'Anita and the Honey Bees' and Class V's 'Mangoes Round the Year' together build the idea that life takes uncountable forms.
Children are taught to distinguish living from non-living using observable criteria they can test themselves:
- Movement — animals move; plants move slowly (leaves towards sunlight, roots towards water).
- Growth — all living things grow in size and complexity.
- Reproduction — they make more of themselves.
- Need for food and water — plants make their own food, animals eat plants or other animals.
- Response to stimuli — a touched mimosa leaf folds; a startled lizard runs.
- Respiration and excretion — all living things breathe and remove waste.
At the primary level, NCERT does not use the formal five-kingdom classification. Instead, it groups life into:
- Plants: trees, shrubs, herbs, climbers, creepers; flowering and non-flowering.
- Animals: mammals (with hair, feed milk), birds (feathered, lay eggs), reptiles (scaly), fish (gilled), amphibians (live on land and water), insects (six legs, often winged), arachnids (eight legs), worms, molluscs.
- Tiny life: in Class V children are told about microbes through fermentation stories — curd-setting bacteria, yeast in dough — without the Latin names.
The pedagogical message is that diversity is wealth: each life form has a role in the larger web. Teachers anchor this by collecting, photographing and listing the plants and animals visible from the school window, then comparing the class list with a list made in another district during a study exchange. Children see directly that biodiversity varies with place.
Habitats — Land, Water and Air
A habitat is the natural place where a plant or animal lives. NCERT EVS introduces habitats in Class III and develops them across Class IV and V through chapters on forests ('Whose Forests?'), deserts ('A River's Tale', 'Walls Tell Stories'), wetlands ('Sunita in Space') and mountains ('A Snake Charmer's Story').
Major habitat types covered:
- Terrestrial: forests (tropical, deciduous, coniferous), grasslands, deserts (hot and cold), mountains and plains.
- Aquatic: freshwater (rivers, lakes, ponds) and marine (sea, ocean, estuaries).
- Aerial: birds, bats and many insects spend most of their lives in flight.
- Special micro-habitats: under stones, in tree-bark crevices, in compost heaps, in rooftop water tanks — children love these because they can investigate them.
India's geographic diversity is highlighted: cold deserts of Ladakh and Spiti lie in the rain-shadow of the Himalayas and receive almost no monsoon rainfall; the hot Thar desert in Rajasthan supports khejri, ber and cactus. The Sundarbans mangrove is a unique brackish-water habitat home to the Royal Bengal Tiger. The Western Ghats, declared a biodiversity hotspot, host endemic species like the Nilgiri tahr and lion-tailed macaque.
Children learn that each habitat shapes the bodies of its inhabitants — a fish needs gills, a camel needs a hump, an Arctic fox needs thick fur. Conversely, organisms shape their habitats too: earthworms aerate soil, bees pollinate flowers, beavers (in cold lands) dam streams.
The teacher's job is to make children's own immediate habitat the first object of study. A village child can be asked: what animals visit the village pond? What grows on the school wall? Habitat learning need not start with snow leopards on faraway peaks — it starts in the sparrow's nest under the eaves.
Plants Around Us — Structure and Function
NCERT EVS introduces plants through their visible parts — roots, stem, leaves, flowers, fruits, seeds — and their daily uses. The Class IV chapter 'Omana's Journey' traces a girl's wonder as she sees a paddy field, banana plantation and coconut grove during a train journey; the Class V chapter 'Seeds and Seeds' turns the kitchen into a botany classroom.
Functions of plant parts (in simple terms):
- Roots anchor the plant and absorb water and minerals. Children can sprout chana or moong in cotton wool to see roots emerge.
- Stem carries water up and food down; supports leaves and flowers. Hollow bamboo, fleshy banana, woody mango — the stem takes many forms.
- Leaves make food using sunlight, water and air (introduced as 'plants cook their own food'); they also breathe and lose water.
- Flowers attract pollinators (bees, butterflies, sunbirds) and develop into fruits.
- Fruits and seeds protect the next generation and travel by wind, water, animals or bursting.
The textbook is careful to question popular categories. Children often think 'carrot is a root' but believe 'potato is also a root'. The pedagogy asks them to dig up a potato plant and trace where the potato grows — they discover it is an underground stem (a tuber). Similarly, ginger and turmeric are rhizomes (modified stems), not roots. The genuine root vegetables in NCERT EVS lists are carrot, beetroot, radish, sweet potato, mooli, sugar-beet, tapioca.
Plants are also classified by size — herbs (soft stem, short life: tulsi, coriander), shrubs (woody, medium height: rose, hibiscus), trees (tall, woody trunk: neem, mango), climbers and creepers (weak stem needing support: money-plant, pumpkin). Children love to classify plants in their own school garden using these categories.
Animals Around Us — Domestic and Wild
NCERT EVS distinguishes domestic animals (tamed by humans for milk, transport, eggs, security, companionship) from wild animals (living independently in nature). Class III's 'Our Friends — Animals' and Class V's 'No Place for Us?' tackle this theme.
Common domestic animals studied:
- Dairy: cow, buffalo, goat — milk and milk products.
- Draught: ox, horse, donkey, camel, yak — transport and ploughing.
- Poultry: hen, duck, turkey — eggs and meat.
- Companion: dog, cat, rabbit, parrot.
- Wool and fibre: sheep, alpaca (in some regions), Angora rabbit.
Wild animals appear in EVS through Indian habitats — Royal Bengal Tiger (Sundarbans), Asiatic Lion (Gir, Gujarat), One-horned Rhinoceros (Kaziranga, Assam), Snow Leopard (Himalayas), Indian Elephant (Western Ghats, North-East), Olive Ridley Turtle (Odisha coast), Great Indian Bustard (Rajasthan).
An important EVS idea is that 'wild' does not mean 'bad'. The textbook gently corrects children who say 'wild animals attack people'. Animals attack only when threatened, ill or starving. Humans encroaching on forests have caused most human-animal conflict, not the other way around. Children learn that respect, distance and habitat protection keep both sides safe.
Care for animals is taught through habits:
- Never throw stones at street animals.
- Keep water bowls out for birds and dogs in summer.
- Do not capture insects or birds for fun.
- If you keep a pet, you accept the duty of feeding, cleaning and providing health care.
The teacher who runs a 'class pet' programme — perhaps a fish tank or a bird-feeder — gives children daily practice in observation and responsibility. CTET items often probe whether teachers recognise this affective dimension of EVS.
Food Chains and Interdependence
A food chain shows who eats whom. NCERT introduces food chains in Class IV and V through simple sequences children can build themselves with cards: grass → grasshopper → frog → snake → hawk.
Key concepts:
- Producers: green plants make their own food from sunlight, water and air. All life ultimately depends on producers.
- Consumers: animals that eat plants (herbivores), animals that eat other animals (carnivores), animals that eat both (omnivores).
- Decomposers: bacteria, fungi and worms break down dead matter, returning nutrients to the soil so producers can grow again.
- Food web: in real ecosystems, many chains cross — a frog may be eaten by a snake, an owl or a heron. The web is sturdier than any single chain.
The textbook emphasises interdependence. Bees pollinate the fruit trees; if bees are wiped out by pesticide, fruits and nuts disappear and humans starve. Vultures eat carrion and prevent disease; their near-extinction in India (due to diclofenac) caused rotting carcasses and rabies outbreaks. Sparrows eat insects on crops; sparrow decline pushes farmers towards more pesticide. These cause-effect stories are the heart of primary EVS.
The greenhouse effect appears in Class V: gases like carbon dioxide, methane and water vapour trap heat from the sun in the atmosphere, like a greenhouse roof. This natural process keeps Earth warm enough for life. But human activity — burning coal, oil and forests, raising large herds of cattle — has added too much CO₂ and methane, causing global warming. Children connect this to local observations: glaciers shrinking, monsoon timing changing, summer growing fiercer.
Another testable theme is the Taj Mahal yellowing caused by sulphur dioxide (from petrol, diesel and nearby factories) reacting with marble. EVS uses such concrete examples to show that pollution damages not only living beings but also our heritage.
Adaptations in Animals and Plants
An adaptation is a feature that helps a living organism survive in its habitat. NCERT EVS Class IV and V dedicate chapters to adaptations through evocative stories rather than dense terminology.
Plant adaptations:
- Hot desert plants (cactus, khejri, ber) — fleshy water-storing stems, leaves reduced to spines, deep roots, waxy coating to slow evaporation.
- Cold desert plants (apple, apricot, willow in Ladakh) — low and bushy to resist wind, deep roots into rocky soil.
- Mountain trees (deodar, pine, oak) — conical shape sheds snow; needle leaves resist freezing.
- Mangrove trees (in Sundarbans) — breathing roots (pneumatophores) for waterlogged saline soil.
- Aquatic plants (lotus, water hyacinth) — air pockets in stems for floating; broad leaves for surface area.
The famous Desert Oak example tested by CTET refers to a tree found in the deserts of Australia; its roots can reach 30 metres down to underground water. The textbook uses it to show that desert life across continents shares similar strategies.
Animal adaptations:
- Camel — hump stores fat, padded feet for sand, long eyelashes, can drink large quantities of water at once.
- Polar bear — thick white fur for warmth and camouflage; layer of blubber.
- Frog — webbed feet for swimming, moist skin for breathing on land.
- Fish — streamlined body, gills, scales, fins.
- Birds — hollow bones, feathered wings, light skeleton; beak shape varies — sparrow's short beak for seeds, sunbird's long beak for nectar, kingfisher's dagger beak for fish.
- Migration — Siberian cranes fly to Bharatpur (Keoladeo) every winter; whales travel across oceans.
- Hibernation and aestivation — frogs sleep through winter; some lizards sleep through hot dry months.
The pedagogical message is that form follows function — every odd feature has a survival reason. Teachers use 'fit-the-feature-to-the-habitat' card games so children practise the reasoning, not just the labels.
Endangered Species and Conservation
An endangered species is one whose population has fallen so low that it risks extinction. NCERT EVS treats this gently but firmly, naming species and the threats they face.
Indian endangered species named in textbooks:
- Royal Bengal Tiger — habitat loss, poaching for fur.
- Asiatic Lion — confined to Gir; vulnerable to disease and inbreeding.
- One-horned Rhinoceros — poached for horn.
- Snow Leopard — fewer than 500 in India.
- Great Indian Bustard — grassland loss; fewer than 150 left.
- Olive Ridley Turtle — beach-light pollution and fishing nets.
- Gharial — sand mining destroys river banks.
- Indian Vulture, White-rumped Vulture — diclofenac poisoning.
Conservation efforts taught at primary level:
- Project Tiger (1973) — created tiger reserves; tiger numbers rose from ~1,800 (1972) to over 3,000 (2022 census).
- National Parks and Sanctuaries — Kaziranga, Jim Corbett, Gir, Periyar, Bandipur, Sundarbans, Ranthambore.
- Biosphere Reserves — Nilgiri, Nanda Devi, Sundarbans.
- Shifting cultivation (jhum) in North-East India — a traditional practice that, when over-shortened, harms forest regeneration; sustainable jhum cycles are part of the conservation discussion.
- Sacred groves — community-protected forest patches, e.g., the devarakadu of Kodagu and orans of Rajasthan; living examples of indigenous conservation.
- Chipko movement (1973, Uttarakhand) — villagers hugged trees to stop logging; introduced in Class V as a story of citizen power.
The pedagogical aim is to move children from fact-knowing ('the tiger is endangered') to action-thinking ('what can I do?'). Tree-planting drives, school 'no plastic' days, bird-watching clubs and visits to nearby sanctuaries translate abstract conservation into habit.
Teaching Living World Through Observation
The NCERT EVS syllabus identifies observation as the foundational skill of primary science. The Class IV teacher's manual lists seven core processes — observing, classifying, predicting, experimenting, communicating, inferring and reflecting — and observation feeds all the others.
What does observation look like in the EVS classroom?
- Nature walks: a short walk in the school grounds with notebooks; children list every plant and animal they meet.
- Sit-spots: each child has a tree or bench to revisit weekly across a term, recording changes through the seasons.
- Sketch journals: drawing a leaf or insect forces sustained attention; children notice details photographs miss.
- Sound mapping: close eyes for two minutes and mark each sound heard — birds, vehicles, wind, voices — on paper.
- Touch boxes: seeds, bark pieces, feathers, dried leaves; children identify by texture without looking.
- Sprouting experiments: grow rajma, moong, fenugreek in cotton wool; observe roots, shoots and leaves over ten days.
The teacher's role is to ask questions, not give answers. 'What do you notice? Why do you think so? What would happen if…?' Open questions invite children to construct meaning. Comparison questions ('How is the neem leaf different from the mango leaf?') sharpen observation further.
Two CTET-tested pedagogical traps:
- Worksheet-only teaching: filling 'name three carnivores' blanks without going outdoors. NCF strongly opposes this.
- Display animals from textbook only: children in Mizoram learning about polar bears but not about hoolock gibbons living next door. EVS must start with the local before the exotic.
Constructivist EVS treats every child as a young naturalist. The teacher who whispers 'shh, look — a snail!' on a rainy school morning is doing real science.
Practice Questions
Q1. Which region has the practice of shifting cultivation in India?
Explanation: Shifting cultivation, locally called jhum, is the traditional rotational farming practised by tribal communities of India's North-Eastern states such as Nagaland, Mizoram, Meghalaya and Arunachal Pradesh. NCERT Class V EVS chapter 'Whose Forests?' discusses jhum to highlight indigenous knowledge and forest livelihoods.
Source: CTET Dec 2018 P1, Q65
Q2. Which of the following is/are greenhouse gas/gases?
Explanation: Carbon dioxide, methane and water vapour all trap heat in Earth's atmosphere and are classified as greenhouse gases. NCERT Class V EVS introduces these in the context of global warming, explaining how excess emissions from fuel-burning and deforestation are altering monsoon patterns and shrinking glaciers.
Source: CTET Dec 2018 P1, Q67
Q3. Why are cold deserts in India not affected by the monsoon?
Explanation: Cold deserts like Ladakh and Spiti lie on the leeward side of the Himalayas, in the rain shadow. Monsoon winds drop their moisture before crossing the high peaks, leaving these regions extremely dry. NCERT EVS uses Ladakh's landscape to teach children how mountains shape rainfall and habitats.
Source: CTET Dec 2018 P1, Q68
Q4. Which one of the following is responsible for turning Taj Mahal yellow?
Explanation: Sulphur-based emissions — primarily sulphur dioxide from nearby refineries, factories and diesel vehicles — react with moisture and deposit on the Taj Mahal's white marble, turning it yellow. NCERT Class V EVS uses this as a concrete example of how air pollution damages not only living beings but also our cultural heritage.
Source: CTET Dec 2018 P1, Q69
Q5. Desert Oak is a tree which is found in
Explanation: Desert Oak is a tall tree native to the central Australian desert, with very deep roots that reach groundwater 30 metres below the surface. NCERT Class V EVS chapter 'A Treat for Mosquitoes' / 'Across the Wall' discusses such desert adaptations to show how plants survive in arid lands worldwide.
Source: CTET Dec 2019 P1, Q64