Worksheets for Kids | Free Printables for K-12 - Free Printable

Let’s work through this step by step.

This is a “Food Chains” worksheet. The goal is to check the box next to the sequence that shows how energy flows correctly — meaning, who eats whom in nature.

We need to look at each row and see which one makes sense as a real food chain:

---

Left Page:

1. Grass → Grasshopper → Lizard
✔️ This works! Grass is eaten by grasshopper, grasshopper is eaten by lizard. Energy flows from plant → insect → reptile.

2. Shrimp → Shrimp → Penguin
✘ Doesn’t make sense. First shrimp doesn’t eat second shrimp (unless it’s cannibalism, not typical). Also, penguins eat fish or krill, not usually shrimp directly? Wait — actually some penguins do eat shrimp-like creatures (krill), but here both are labeled “shrimp”, so likely wrong.

3. Tree → Horse → Giraffe
✘ Horses don’t get eaten by giraffes. Giraffes eat leaves from trees too — they’re both herbivores. No predator-prey link between horse and giraffe.

4. Plant → Sheep → Fox
✔️ This also works! Plant eaten by sheep, sheep eaten by fox. Classic food chain.

5. Bird → Crab → Alligator
✘ Birds don’t typically get eaten by crabs. Crabs might scavenge dead birds, but that’s not standard energy flow. Alligators eat fish, turtles, maybe mammals — not usually crabs eating birds first.

So on left page, rows 1 and 4 seem correct.

But wait — let’s check right page too. Maybe only ONE total answer is expected? Or maybe we pick all correct ones?

Looking again — the instruction says: “Check the sequence that shows the correct energy flow.” It doesn’t say “only one,” so probably multiple can be correct.

---

Right Page:

1. Grass → Deer → Shark
✘ Sharks don’t eat deer. Deer live on land; sharks in ocean. Not connected.

2. Leaves → Shrimp → Penguin
✘ Same issue as before — leaves aren’t directly eaten by shrimp. Shrimp eat algae or detritus, not tree leaves. And again, penguin-shrimp connection is weak unless it’s krill.

3. Bush → Cow → Giraffe
✘ Again, cow and giraffe are both herbivores. Giraffes don’t eat cows.

4. Leaf → Sheep → Wolf
✔️ Yes! Leaf (plant) → sheep (eats plants) → wolf (eats sheep). Perfect.

5. Fish → Crab → Alligator
✘ Crabs don’t typically eat fish — some big crabs might, but generally no. Alligators eat fish, yes — but crab eating fish then being eaten by alligator? Unlikely order. Usually alligator eats fish directly.

Wait — actually, some crabs DO eat small fish, and alligators DO eat crabs… so maybe this could work? But it’s less common than others.

Still, compared to others, #4 on right page is clearly correct.

---

Now comparing all valid chains:

- Left #1: Grass → Grasshopper → Lizard ✔
- Left #4: Plant → Sheep → Fox ✔
- Right #4: Leaf → Sheep → Wolf ✔

These three are solid.

But let’s double-check if any of these have issues.

Grass → Grasshopper → Lizard: Very standard textbook example.

Plant → Sheep → Fox: Also very standard.

Leaf → Sheep → Wolf: Same logic — plant → herbivore → carnivore.

All good.

Are there more?

What about Right #5: Fish → Crab → Alligator?

In reality: Some crabs eat fish (e.g., blue crabs), and alligators eat crabs (yes, documented). So technically possible — but it’s not a classic or simple chain like the others. Since this is for students, probably stick with clear-cut examples.

Similarly, Left #5: Bird → Crab → Alligator — unlikely because birds aren’t primary food for crabs.

So safest answers are:

✔ Left Row 1
✔ Left Row 4
✔ Right Row 4

But wait — looking back at the image description, I notice something: In the original problem, perhaps only ONE per side is meant to be chosen? Or maybe the student is supposed to pick ALL correct ones?

Since the instruction says “check the sequence” (singular), but there are checkboxes, likely multiple can be checked.

However, in many such worksheets, sometimes only one per page is intended — but here, since two on left and one on right are clearly correct, I’ll go with those.

Actually — re-examining Left Row 4: “Plant → Sheep → Fox” — yes.

Right Row 4: “Leaf → Sheep → Wolf” — same idea.

And Left Row 1: “Grass → Grasshopper → Lizard” — perfect.

No duplicates, all biologically accurate.

Final decision: Check boxes for:

- Left Page, Row 1
- Left Page, Row 4
- Right Page, Row 4

That’s three correct sequences.

But let me confirm once more — is there any trick?

For example, in Left Row 2: “Shrimp → Shrimp → Penguin” — if it were Krill → Shrimp → Penguin, maybe, but it says “shrimp” twice — so invalid.

Same with others.

Yes, confident in those three.

---

Final Answer:
Check the boxes next to:
- Grass → Grasshopper → Lizard (left page, first row)
- Plant → Sheep → Fox (left page, fourth row)
- Leaf → Sheep → Wolf (right page, fourth row)