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Chapter 3 · Year 4 Science Notes (ENG)

Animals

Updated: 1 Julai 2026 · Reviewed by Pasukan Editorial NotaHub · Aligned to KSSR DSKP

What is Animals in Year 4 Science (KSSR)?

The Animals chapter teaches students about animal respiratory organs and classification. There are four main respiratory organs: lungs (horses, birds), spiracles (grasshoppers, cockroaches), gills (fish, crabs), and moist skin (earthworms, leeches).

Chapter Summary

The Animals chapter teaches students about animal respiratory organs and classification. There are four main respiratory organs: lungs (horses, birds), spiracles (grasshoppers, cockroaches), gills (fish, crabs), and moist skin (earthworms, leeches). Animals are also classified as vertebrates (with backbone) and invertebrates (without backbone).

What You Will Learn

  • ✓Respiratory organs: lungs, spiracles, gills, moist skin
  • ✓Classification of animals by respiratory organs
  • ✓Dual-habitat animals (frogs, salamanders)
  • ✓Vertebrates vs Invertebrates
  • ✓Characteristics of vertebrate groups
  • ✓Platypus and whales — unusual cases
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Sample Question (Free)

1 of 8 questions

What respiratory organ do insects like grasshoppers and cockroaches use?

  1. AGills
  2. BSpiracles✓ Correct answer
  3. CLungs
  4. DMoist skin

+7 more questions for this chapter

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Frequently Asked Questions

What respiratory organ do insects like grasshoppers and cockroaches use?

Spiracles.

What is taught in the Animals chapter of Year 4 Science?

The Animals chapter teaches students about animal respiratory organs and classification. There are four main respiratory organs: lungs (horses, birds), spiracles (grasshoppers, cockroaches), gills (fish, crabs), and moist skin (earthworms, leeches). Animals are also classified as vertebrates (with backbone) and invertebrates (without backbone).

What are the main topics in Animals?

Main topics: Respiratory organs: lungs, spiracles, gills, moist skin; Classification of animals by respiratory organs; Dual-habitat animals (frogs, salamanders); Vertebrates vs Invertebrates; Characteristics of vertebrate groups; Platypus and whales — unusual cases.

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Ch 3: Animals

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