Let's analyze each food chain to determine which ones show the
correct energy flow in a simple food chain. In a food chain, energy flows from
producers (plants or organisms that make their own food) to
consumers (animals that eat other organisms), typically moving from lower trophic levels to higher ones.
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🔹 Food Chain 1:
Grass → Deer → Snake → Mountain Lion
- Grass: Producer
✔
- Deer: Herbivore (eats grass)
✔
- Snake: Carnivore (eats small animals like mice, not usually deer)
✘
- Mountain Lion: Apex predator (eats deer, but not snakes)
✘ Incorrect: Snakes do not typically eat deer. This is an unrealistic sequence. Deer are too large for most snakes.
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🔹 Food Chain 2:
Grasshopper → Mouse → Snake → Hawk
- Grasshopper: Primary consumer (eats plants)
✔
- Mouse: Secondary consumer (eats insects like grasshoppers)
✔
- Snake: Tertiary consumer (eats mice)
✔
- Hawk: Apex predator (eats snakes)
✔
✔ Correct: This is a realistic and logical energy flow.
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🔹 Food Chain 3:
Green Plant → Bees → Bird → Snake
- Green Plant: Producer
✔
- Bees: Primary consumers (pollinate and feed on nectar)
✔
- Bird: Secondary consumer (eats bees)
✔
- Snake: Tertiary consumer (eats birds)
✔
✔ Correct: This is a valid food chain. Birds eat bees, and snakes can eat birds.
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🔹 Food Chain 4:
Algae → Krill → Adelie Penguin → Killer Whale
- Algae: Producer (photosynthetic)
✔
- Krill: Primary consumer (eats algae)
✔
- Adelie Penguin: Secondary consumer (eats krill)
✔
- Killer Whale: Apex predator (eats penguins)
✔
✔ Correct: This is a classic marine food chain.
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🔹 Food Chain 5:
Green Plant → Squirrel → Snake → Owl
- Green Plant: Producer
✔
- Squirrel: Herbivore (eats plants)
✔
- Snake: Carnivore (can eat squirrels)
✔
- Owl: Apex predator (eats snakes)
✔
✔ Correct: This is a realistic terrestrial food chain.
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✔ Final Answer:
The
correct food chains (with proper energy flow) are:
-
✔ Grasshopper → Mouse → Snake → Hawk
-
✔ Green Plant → Bees → Bird → Snake
-
✔ Algae → Krill → Adelie Penguin → Killer Whale
-
✔ Green Plant → Squirrel → Snake → Owl
✘ The first one (
Grass → Deer → Snake → Mountain Lion) is
incorrect because snakes don’t eat deer.
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✔ Checkboxes to select:
- [ ] Grass → Deer → Snake → Mountain Lion
✘
- [✔️] Grasshopper → Mouse → Snake → Hawk
✔
- [✔️] Green Plant → Bees → Bird → Snake
✔
- [✔️] Algae → Krill → Adelie Penguin → Killer Whale
✔
- [✔️] Green Plant → Squirrel → Snake → Owl
✔
👉 So,
check the boxes for food chains 2, 3, 4, and 5.
Parent Tip: Review the logic above to help your child master the concept of food web worksheet 4th grade.
