Why elephants reach a farm
They did not get lost.
When the plants elephants feed on grow scarce and the waterholes dry, the animals go looking for food - and a field of bananas or sugarcane is food.
📚 Chapter Learning Kit
How Nature Works in Harmony · Class 8 Science · Curiosity
English 5 topics 175 leveled MCQs 85 flashcards 5 games Free
Shared by a Veda teacher · Generated with Veda AI · Oct 2026
⚡ Veda Bites
✏️ Example
💡 Concept
💡 Concept
💡 Concept
✏️ Example
💡 Tip
The whole idea, one bite at a time
Veda Bites are swipeable micro-lessons — each one teaches exactly one idea. Here's a taste from this kit; the app has the full deck.
What a habitat is
A habitat can be very small.
A habitat is simply the place where an organism lives. A pond, a farm, a forest - and also the bark of one tree.
Biotic and abiotic
Two lists, and both are needed.
Stand in a habitat and sort what you see. Fish, grass, birds and trees are alive, and they are the biotic components.
What a population is
Same kind, same moment.
A population is a group of organisms of the same kind living in one habitat at one time.
Counting a population
A metre of string is enough.
Mark a square one metre on each side in a garden, pick a kind of plant and count the individuals inside it.
Why variety is not decoration
Imagine a habitat of one kind.
If every organism in a place were of one kind, every individual would need the same food, water and space at the same time.
📖 Smart notes
What you'll study, topic by topic
1
Habitat, Biotic and Abiotic
A habitat is where an organism lives, and everything in it is either alive or not alive - two lists that depend on each other completely.
- A habitat is the place where an organism lives, and it may be as small as the bark of one tree.
- The living things in a habitat are its biotic components.
- Air, water, soil, sunlight and temperature are its abiotic components.
~40 min · full explanation, examples & memory tricks in the app
2
From an Individual to an Ecosystem
Individual, population, community, ecosystem - and a study of two ponds that shows how fish in the water can change the flowers on the bank.
- A population is a group of organisms of the same kind in one habitat at one time.
- A population can be counted by marking a square a metre on each side and counting inside it.
- If only one kind lived in a habitat, every individual would need the same things and competition would follow.
~50 min · full explanation, examples & memory tricks in the app
3
Who Eats Whom
Producers, consumers and decomposers; food chains that cross into a web; trophic levels that stack into a pyramid; and why nothing in nature is wasted.
- Green plants make their own food by photosynthesis and are called producers or autotrophs.
- Organisms that cannot make their own food are consumers or heterotrophs.
- Herbivores eat only plants, carnivores only animals, and omnivores eat both.
~50 min · full explanation, examples & memory tricks in the app
4
Balance, and How It Breaks
One change in an ecosystem sets off others, as frog-leg exports ended in pesticide on fields - and competition, mutualism, commensalism and parasitism hold the balance.
- Pollution kills pond plants, so less oxygen is produced and the fish population drops.
- Fewer fish means more insects, which spread to farmland and bring pesticides into use.
- In the 1980s large-scale export of Indian bullfrog legs made frog populations fall.
~50 min · full explanation, examples & memory tricks in the app
5
What Ecosystems Give Us
Air, soil, food, timber and medicine, the Sundarbans that break the storms, the parks that protect whole habitats, and a farm that can be managed well or badly.
- Forests give timber, medicines, food, fibres, fertile soil and fresh medicines; aquatic ecosystems give water and food.
- The Sundarbans hold the largest mangrove forest in the world, where the Ganges and Brahmaputra meet.
- Its mangroves slow the waves and strong winds a storm or a flood brings, and the trees take in carbon dioxide.
~50 min · full explanation, examples & memory tricks in the app
❓ Leveled MCQ practice
Try the smart MCQs from this kit
175 questions laddered from warm-up to topper-level, each with an explanation. A taste:
A habitat is best described as
Beginner
A the place where an organism lives
B the food an organism eats daily
C the season an organism breeds within
D the group an organism belongs to
Show answer & explanation
the place where an organism lives
It is the place, and it may be as large as a forest or as small as the bark of one tree.
Which of these is an abiotic component of a pond?
Beginner
A The algae growing near the edges
B The dissolved oxygen in the water
C The duckweed floating on the top
D The snails along the muddy bottom
Show answer & explanation
The dissolved oxygen in the water
Oxygen is not alive. Duckweed, snails and algae all belong to the biotic list.
A pupil lists water, soil, sunlight and temperature from a forest. What has she listed?
Beginner
A Its food chain in full order
B Its population of one kind
C Its abiotic components only
D Its biotic components only
Show answer & explanation
Its abiotic components only
None of the four is alive, so all four belong to the abiotic list.
Which four things must a habitat provide?
Beginner
A Food, water, salt and the sunlight
B Shelter, soil, sand and warmth
C Water, warmth, wind and space
D Space, shelter, oxygen and food
Show answer & explanation
Space, shelter, oxygen and food
A habitat short of any one of the four supports less life than it could.
🃏 Flashcards
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85 flashcards in this kit — the app reviews them with spaced repetition so the right card returns on the right day.
🎮 Learning games
Play your way through this kit
Every game is built from this kit's own content — scores feed your mastery, so playing counts as studying.
Categorization
Fact Or Myth
Sequence Builder
Memory Match
Speed Quiz
Playable in the app
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