Define the terms
1. Habitat- The natural home of an animal is called habitat.
2. Migration- When animals leave their habitat for another one that has better climatic conditions.
3. Terrestrial animals- Animals that live on land are called terrestrial animals.
Answer in one line
1. What is hibernation?
Ans. A long winter sleep of animals to escape from cold weather conditions is called hibernation.
2. What are amphibians?
Ans. Animals that can live both on land and on the water are called amphibians.
3. What is blubber?
Ans. Animals like polar bears, penguins, etc have a thick layer of fat under their skin called blubber. This layer protects them from extreme cold.
4. What is echolocation?
Ans. It is the ability to observe an environment using sound.
Answer in short
1. Why do birds migrate?
Ans. Due to extreme weather conditions, some birds migrate from one place to another in search of food and shelter eg- arctic tern.
2. What is camouflage? How does it protect animals?
Ans. Camouflage is the ability to blend into the surrounding environment. It protects the animal as it acts in self-defense and protects them from enemies eg- chameleon, zebra, etc.
3. How does a puffer fish protect itself?
Ans. Pufferfish can inflate into a ball shape to evade predators. Some species also have spines on their skin to ward off predators. It is also known as blowfish.
Answer in detail
1. Differentiate between aerial and arboreal animals.
Ans. Arboreal animals Aerial animals
1. They spend most of their They spend most of their
time on trees time in the air.
2. They have claws, strong They have light bodies covered with
arms, and legs to climb. feathers.
3. Their bones are dense and Their bones are hollow and higher.
heavier. Eg- birds, bats, etc
4. Eg- monkeys, squirrels, etc
2. What is adaptation? Why do animals need to adapt?
Ans. The special feature that helps the animals to live and grow in their environment is adaptation. It is needed so that animals can survive the climatic conditions of the ecosystem, predators, and other species that compete for the same food and place.
Give reason
1. Tick the odd one and say why.
i) Frog ii) fish iii) Salamander
Ans. Fish. Because fish and salamander are amphibians and fish is an aquatic animal.
2. Penguine has dark-colored feathers.
Ans. To observe the sun's heat to keep it warm.
3. Whale is a mammal.
Ans. It gives birth directly to young ones and they breathe through the lungs.
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