Let’s go step by step to answer each question clearly and simply.
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Q1. What is a food web?
A food web shows how different animals and plants are connected through what they eat. It’s like a big map of who eats whom in nature. Unlike a single food chain, a food web has many chains linked together because most animals eat more than one thing.
→ So, a food web = many food chains joined together.
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Q2. What would happen if the snake population decreases?
Look at the food web: snakes eat frogs and birds. If there are fewer snakes:
- Frogs and birds will have fewer predators → their numbers might increase.
- But then, frogs eat grasshoppers — so more frogs could mean fewer grasshoppers.
- Also, hawks and owls eat snakes — so if snakes disappear, hawks and owls might have less food and their numbers could drop too.
So, changing one part (like snakes) affects many other parts of the web.
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Q3. When do we consider the ecosystem to be in equilibrium?
An ecosystem is in equilibrium when all the populations stay about the same over time — not growing too fast or dying out. This happens when:
- There’s enough food for everyone.
- Predators don’t eat too many prey.
- Nothing big changes (like disease, fire, or humans removing animals).
It’s like a balance — everything works together smoothly.
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Q4. What happens to energy as we move up from one step to another in a chain or web?
Energy gets smaller as you go up. Why?
- Plants (producers) get energy from the sun.
- Animals that eat plants only get some of that energy — the rest is used by the plant or lost as heat.
- Then, animals that eat those animals get even less energy.
- By the time you reach top predators (like hawks), there’s very little energy left.
That’s why there are usually fewer top predators — they need lots of space and food to survive.
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Now let’s look at the
food chain part:
Sun → Grass → Grasshopper → Frog → Snake → Hawk
Q1. What is a food chain?
A food chain is a simple line showing who eats whom. It starts with the sun (energy source), then a producer (plant), then consumers (animals) in order.
Example: Grass makes its own food → Grasshopper eats grass → Frog eats grasshopper → etc.
It’s just ONE path — unlike a food web which has many paths.
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Q2. Name the producer in the food chain.
The producer is the organism that makes its own food using sunlight — that’s the
grass.
Plants are always producers in food chains.
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Final Answer:
Food Web Questions:
Q1. A food web is a network of many interconnected food chains showing how energy flows between different organisms in an ecosystem.
Q2. If the snake population decreases, frog and bird populations may increase, which could reduce grasshopper numbers. Also, hawk and owl populations may decrease due to less food.
Q3. An ecosystem is in equilibrium when all populations remain stable over time, with balanced birth/death rates and no major disruptions.
Q4. Energy decreases as you move up each level — only about 10% passes to the next level; the rest is lost as heat or used for life processes.
Food Chain Questions:
Q1. A food chain is a straight-line sequence showing how energy moves from one organism to another, starting with a producer and ending with a top predator.
Q2. The producer in the food chain is
Grass.
Parent Tip: Review the logic above to help your child master the concept of food web and food chain worksheet.
