Educational worksheet for children to identify herbivores, omnivores, and carnivores among arthropods.

Let's solve the "Spot the Impostor" worksheet step by step.

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Understanding the Task

We are given 9 arthropods, grouped into three categories:
- Herbivores (HB) – eat only plants
- Omnivores (OB) – eat both plants and animals
- Carnivores (CB) – eat only animals

Our job is to:
1. Identify one impostor in each category (i.e., an animal that does not belong in that category).
2. Mark the impostor with an X.
3. Write the correct category (HB, OB, or CB) for the impostor.

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Step 1: Analyze Each Category

#### ✔ #Herbivores
Animals listed:
1. Grasshopper → Eats plant material → Herbivore ✔
2. Red Spider Mite → Feeds on plant sap → Herbivore ✔
3. Butterfly → Adult butterflies feed on nectar (plant-based) → Herbivore ✔

Wait — all three seem like herbivores? But we need one impostor per category.

Let’s double-check:

- Grasshopper: Herbivore ✔
- Red Spider Mite: Herbivore ✔
- Butterfly: Herbivore ✔

Hmm… maybe not. Let’s look at the other categories first.

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#### ✔ #Omnivores
Animals listed:
1. Bees → Eat nectar (plants) and pollen (plants), but also consume honey and sometimes dead insects (rare). However, bees are primarily herbivores (nectar/pollen). They are not omnivores.
→ So Bees might be the impostor here.

2. Prawn → Eats algae, detritus, small fish, plankton → Omnivore ✔
3. Crab → Eats plants, meat, carrion, etc. → Omnivore ✔

So, Bees are not true omnivores; they’re mostly herbivores.

➡️ Impostor in #Omnivores: Bees
→ Should be labeled as HB (Herbivore)

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#### ✔ #Carnivores
Animals listed:
1. Centipede → Predatory, eats insects, worms → Carnivore ✔
2. Lobster → Eats fish, mollusks, crustaceans, and also scavenges → Carnivore, but can be omnivorous too.
→ Lobster is often considered omnivorous because it eats both meat and plant matter.

3. Scorpion → Predatory, eats insects, spiders → Carnivore ✔

So, Lobster may be the impostor here because it's not strictly carnivorous.

➡️ Impostor in #Carnivores: Lobster
→ Should be labeled as OB (Omnivore)

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Now back to Herbivores.

We have:
- Grasshopper → HB ✔
- Red Spider Mite → HB ✔
- Butterfly → HB ✔

But wait — is there a mistake? All three are herbivores?

Wait! Let's re-express the layout.

Looking at the grid:

| Herbivores | Omnivores | Carnivores |
|------------|-----------|------------|
| Grasshopper | Bees | Centipede |
| Red Spider Mite | Prawn | Butterfly |
| Crab | Lobster | Scorpion |

Ah! I see the issue — the labels are column headers, but the animals are arranged in rows.

Wait — actually, no. The categories are columns, so:

- Herbivores column: Grasshopper, Red Spider Mite, Crab
- Omnivores column: Bees, Prawn, Lobster
- Carnivores column: Centipede, Butterfly, Scorpion

So let’s re-analyze based on correct column assignments.

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Revised Analysis by Column

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#### 🔹 #Herbivores (Column 1)
1. Grasshopper → Eats grass, leaves → Herbivore ✔
2. Red Spider Mite → Feeds on plant sap → Herbivore ✔
3. Crab → Eats crabs, snails, fish, algae, carrion → Omnivore/Carnivore ✘
→ Crab is NOT a herbivore → Impostor

✔ So, Crab is the impostor in the Herbivores column.

→ Correct category: OB (Omnivore)

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#### 🔹 #Omnivores (Column 2)
1. Bees → Eat nectar and pollen → Herbivores ✘
→ Not omnivores → Impostor

2. Prawn → Eats algae, detritus, small animals → Omnivore ✔
3. Lobster → Eats fish, shellfish, plants, carrion → Omnivore ✔

So, Bees is the impostor here.

→ Correct category: HB (Herbivore)

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#### 🔹 #Carnivores (Column 3)
1. Centipede → Predatory, eats insects → Carnivore ✔
2. Butterfly → Adults drink nectar → Herbivore ✘
→ Not carnivore → Impostor

3. Scorpion → Eats insects, spiders → Carnivore ✔

So, Butterfly is the impostor in the Carnivores column.

→ Correct category: HB (Herbivore)

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✔ Final Answers:

| Category | Impostor | Mark with X | Correct Category |
|----------------|---------------|-------------|------------------|
| Herbivores | Crab | ✔ X | OB |
| Omnivores | Bees | ✔ X | HB |
| Carnivores | Butterfly | ✔ X | HB |

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📝 How to Fill the Worksheet:

Under each category, put an X beside the impostor and write the correct category.

#### #Herbivores
- Grasshopper → ✔
- Red Spider Mite → ✔
- Crab → X → OB

#### #Omnivores
- Bees → X → HB
- Prawn → ✔
- Lobster → ✔

#### #Carnivores
- Centipede → ✔
- Butterfly → X → HB
- Scorpion → ✔

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✔ Summary of Impostors:

- Crab → belongs to OB (Omnivores)
- Bees → belongs to HB (Herbivores)
- Butterfly → belongs to HB (Herbivores)

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✔ Final Answer:

> Herbivores: X next to Crab, write OB
> Omnivores: X next to Bees, write HB
> Carnivores: X next to Butterfly, write HB

This completes the task!