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Staying Alive - Animal groups and different life cycles

Grade 3Cambridge (IGCSE)

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

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Mammals: Features include having hair or fur, being warm-blooded, giving birth to live young (not eggs), and feeding their babies with milk. Examples include humans, lions, and whales.

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Birds: Features include having feathers, wings, and a beak. They lay eggs with hard shells and are warm-blooded. Examples include eagles, penguins, and sparrows.

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Reptiles: Features include dry, scaly skin. They are cold-blooded and usually lay leathery eggs on land. Examples include snakes, lizards, and turtles.

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Amphibians: Features include moist, slimy skin. They spend part of their life in water (breathing through gills) and part on land (breathing through lungs). Examples include frogs and salamanders.

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Fish: Features include scales, fins, and gills to breathe underwater. Most fish lay eggs in water and are cold-blooded. Examples include sharks and goldfish.

📐Formulae

General Life Cycle:Birth→Growth→Reproduction→DeathGeneral \ Life \ Cycle: Birth \rightarrow Growth \rightarrow Reproduction \rightarrow Death

Butterfly Life Cycle:Egg→Larva (Caterpillar)→Pupa (Chrysalis)→AdultButterfly \ Life \ Cycle: Egg \rightarrow Larva \ (Caterpillar) \rightarrow Pupa \ (Chrysalis) \rightarrow Adult

Frog Life Cycle:Egg→Tadpole→Froglet→AdultFrog \ Life \ Cycle: Egg \rightarrow Tadpole \rightarrow Froglet \rightarrow Adult

Total main Vertebrate groups=5Total \ main \ Vertebrate \ groups = 5

💡Examples

Problem 1:

An animal has scales, breathes through gills, and lives entirely underwater. Identify the group it belongs to.

Solution:

Fish

Explanation:

Scales and gills are the primary identifying features of the Fish group among vertebrates.

Problem 2:

Identify the 44 stages of a butterfly's life cycle in the correct order.

Solution:

1. Egg→2. Larva→3. Pupa→4. Adult1. \text{ Egg} \rightarrow 2. \text{ Larva} \rightarrow 3. \text{ Pupa} \rightarrow 4. \text{ Adult}

Explanation:

A butterfly starts as an egg, becomes a caterpillar (larva), transforms inside a chrysalis (pupa), and emerges as a winged adult.

Problem 3:

If a group of animals includes 1212 mammals, 88 birds, and 55 reptiles, what is the total number of vertebrates in the group?

Solution:

12+8+5=2512 + 8 + 5 = 25

Explanation:

All three categories (mammals, birds, and reptiles) are types of vertebrates. Adding them together gives the total count: 12+8=2012 + 8 = 20, and 20+5=2520 + 5 = 25.