Invertebrate Classification Worksheet Solution
This worksheet asks you to match each invertebrate animal to its correct classification based on key characteristics. Let's go through each animal and match it with the appropriate group.
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Step-by-step Matching:
1.
Sea Sponge
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Characteristics: Spongy texture, lives in water.
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Classification:
Porifera (because "porifera" means "pore-bearing," and sponges have many pores; they also live in water).
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✔ Match:
Porifera
2.
Jellyfish
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Characteristics: Lives in water, has stinging cells (cnidocytes), radial symmetry.
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Classification:
Cnidaria (this group includes jellyfish, corals, and sea anemones — all with stinging cells and live in water).
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✔ Match:
Cnidaria
3.
Snail
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Characteristics: Soft body with a shell.
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Classification:
Mollusks (mollusks include snails, clams, octopuses — soft-bodied animals often with shells).
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✔ Match:
Mollusks
4.
Cricket
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Characteristics: Exoskeleton, jointed legs, segmented body.
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Classification:
Arthropods (insects like crickets have exoskeletons and jointed appendages).
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✔ Match:
Arthropods
5.
Earthworm
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Characteristics: Long, segmented body.
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Classification:
Annelids (worms) (earthworms are classic examples of annelids due to their segmented bodies).
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✔ Match:
Annelids (worms)
6.
Sea Star
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Characteristics: Lives in water, radial symmetry, has spines or spiny skin.
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Classification:
Echinoderms (sea stars, sea urchins, sand dollars — all echinoderms — have radial symmetry and spiny exteriors).
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✔ Match:
Echinoderms
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✔ Final Answer Key:
| Invertebrate | Classification |
|------------------|----------------------|
| Sea sponge |
Porifera |
| Jellyfish |
Cnidaria |
| Snail |
Mollusks |
| Cricket |
Arthropods |
| Earthworm |
Annelids (worms) |
| Sea star |
Echinoderms |
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🔍 Explanation Summary:
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Porifera → Sponges; simple, porous, aquatic.
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Cnidaria → Jellyfish, corals; stinging cells, radial symmetry.
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Mollusks → Snails, clams; soft body, often with a shell.
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Arthropods → Crickets, spiders; exoskeleton, jointed legs.
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Annelids → Earthworms; long, segmented bodies.
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Echinoderms → Sea stars, sea urchins; radial symmetry, spiny skin, marine.
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This helps students understand how scientists classify animals based on physical traits and habitats! 🌊🐚🐛🌟
Parent Tip: Review the logic above to help your child master the concept of invertebrate worksheet.
