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Animals Around Us - Variety of Animals and Their Habitats

Grade 3CBSE

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

🔑Concepts

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Animals are found everywhere: on land, in water, in the air, and even on trees. They vary in size, shape, and color.

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A Habitat is the natural home or environment of an animal where it gets food, water, and shelter. The basic requirement for survival can be represented as Survival∝Habitat Quality\text{Survival} \propto \text{Habitat Quality}.

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Terrestrial Animals: These animals live on land. Examples include lions, tigers, and cows. Some, like camels, are adapted to deserts and can survive without H2OH_2O for many days.

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Aquatic Animals: These animals live in water (H2OH_2O). They usually have fins or flippers to swim and gills to breathe oxygen dissolved in the water.

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Amphibians: Animals that can live both on land and in water. Examples include frogs and toads. They often breathe through their skin while in H2OH_2O.

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Arboreal Animals: These animals spend most of their time on trees, such as monkeys and squirrels.

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Aerial Animals: Animals that can fly and spend a lot of time in the air, like birds and bats. Their bodies are light because of hollow bones.

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Movement: Animals move in different ways—walking, crawling, flying, or swimming—depending on their body structure and habitat.

📐Formulae

Habitat=Food+Water+Shelter+Space\text{Habitat} = \text{Food} + \text{Water} + \text{Shelter} + \text{Space}

Herbivores  ⟹  Plant Eaters\text{Herbivores} \implies \text{Plant Eaters}

Carnivores  ⟹  Flesh Eaters\text{Carnivores} \implies \text{Flesh Eaters}

Omnivores  ⟹  Plant Eaters+Flesh Eaters\text{Omnivores} \implies \text{Plant Eaters} + \text{Flesh Eaters}

💡Examples

Problem 1:

Identify the habitat of a Whale and explain one adaptation it has for that environment.

Solution:

Habitat: Aquatic (H2OH_2O). Adaptation: Whales have 'flippers' to help them swim and a 'blowhole' on top of their heads to breathe air.

Explanation:

Whales are mammals that live in water; since they don't have gills like fish, they must come to the surface to breathe through their blowhole.

Problem 2:

Why do birds have hollow bones?

Solution:

Birds have hollow bones to keep their body weight low (Mass↓Mass \downarrow).

Explanation:

Lower body mass makes it easier for the bird to lift itself off the ground and fly through the air (Aerial habitat).

Problem 3:

Match the animal to its category: (A) Frog, (B) Monkey, (C) Lion.

Solution:

(A) Amphibian, (B) Arboreal, (C) Terrestrial.

Explanation:

Frogs live in both land/water, monkeys live on trees, and lions live on land (ground).