This worksheet is designed to help students classify living things into their correct biological kingdoms. The image shows six different organisms, each with a blank label to fill in. The first one is already labeled “Animalia,” which gives us the clue that we need to identify the kingdom for each organism.
Let’s go through each image and assign the correct biological kingdom:
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1. Snake (already labeled)
✔ Kingdom: Animalia
*Explanation:* Snakes are multicellular, heterotrophic organisms that can move and have complex organ systems — all characteristics of animals.
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2. Three plants (potted plant, spider plant, cactus)
✔ Kingdom: Plantae
*Explanation:* These are all photosynthetic, multicellular organisms with cell walls made of cellulose. They are rooted in place and produce their own food — classic traits of plants.
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3. Mushroom
✔ Kingdom: Fungi
*Explanation:* Mushrooms are not plants! They are fungi — heterotrophs that absorb nutrients from decaying matter. They have chitin in their cell walls and reproduce via spores.
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4. Paramecium (single-celled organism with cilia)
✔ Kingdom: Protista
*Explanation:* This is a unicellular eukaryote, often found in freshwater. Protists are a diverse group of mostly single-celled organisms that don’t fit neatly into the other kingdoms.
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5. Bacterium (rod-shaped with flagella)
✔ Kingdom: Monera (or more accurately, Bacteria)
*Note:* Modern taxonomy has replaced “Monera” with two domains: Bacteria and Archaea. But in many K–12 curricula, especially at this level, it’s still referred to as
Kingdom Monera or simply
Bacteria.
*Explanation:* These are prokaryotic, single-celled organisms without a nucleus. They are microscopic and can be beneficial or harmful.
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6. Another bacterium (spiral-shaped, possibly Spirochaete)
✔ Kingdom: Monera (or Bacteria)
*Explanation:* Same as above — this is another type of prokaryotic microorganism. Even though it looks different from #5, it still belongs to the same kingdom/domain.
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✔ Final Answers to Fill In:
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Image 2 (plants): `Plantae`
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Image 3 (mushroom): `Fungi`
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Image 4 (Paramecium): `Protista`
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Image 5 (rod-shaped bacterium): `Monera` or `Bacteria`
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Image 6 (spiral bacterium): `Monera` or `Bacteria`
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💡 Optional Title Suggestion:
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“Classifying Living Things by Kingdom”
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This activity reinforces the five-kingdom classification system commonly taught in elementary/middle school biology (Animalia, Plantae, Fungi, Protista, Monera). It helps students visually connect organisms with their correct biological groups.
Let me know if you’d like this adapted for the modern three-domain system (Bacteria, Archaea, Eukarya) instead!
Parent Tip: Review the logic above to help your child master the concept of classification of organisms worksheet.
