CBSE Class 4 EVS – Looking around – Takshila-DPS Pune- Patna-Coimbatore

AUTHOR

Dr. Gauri Kshirsagar

MBBS, DNB (DVL)

Dermatologist, Cosmetologist and Laser Surgeon

Nuleaf Skin Clinic and Hair Transplant Center, Undri, Pune

www.nuleafhair.com

The following notes are from the academic year 2022-23 of DPS Pune- Patna-Coimbatore, compiled by my twin daughters. These notes include all the important material of the chapter which can be asked in the exam, compiled from the EVS textbook, study course material books and the notes from class.

Readers, if you find these notes helpful please do write your views in the ‘comment section’ of this article and if you like me to upload any notes on any topic taught in class 4, please be free to post your replies. Subscribe to my blog for new updates, notes and posts. Have a great year and all the best.

Chapter 2: EAR TO EAR

Important Points which can be asked as Fill in the Blanks or MCQs:

1. In the absence of hair on the skin of an animal, there will be no colour and no patterns.
2. The different patterns on the animals are due to the hair on their back.
3. Animals that give birth to young ones are called Mammals.
4. The natural home or environment of a plant, animal or any other organism. Habitat
5. The small openings in the skull of birds, protected by feathers. Ears
6. Animals that live on trees. Arboreal
7. An organ responsible for the sense of hearing and balance. Ear
8. Elephants, buffaloes have very less hair on their skin to keep them cool.
9. Different patterns on animals are due to their hair on the skin.
   Birds have ears which are small openings in the skull and are protected by feathers.
10. The porcupine and hedgehog have pointed spines which  become erect when they sense danger.
11. Animals like the polar bear and the yaks have thick and furry skin to keep their body warm.
12. Birds, reptiles and insects lay eggs, which hatch to produce their young ones.
13. Bats are exceptional animals that can fly.

TYPES OF ANIMAL GROUPS

1. Terrestrial – Animals that live on land
2. Aquatic – Animals that live in water
3. Arboreal – Animals that live on trees
4. Pet animals– Animals that live with us at home
5. Domestic animals– Animals that are tamed by man. They live in houses or on farms.

Fish		Lay eggsDo not have external earsDo not have hair on their body. Do not feed their babies on mother’s milk.
Amphibian
Birds	Sparrow, crows, parrots
Reptiles	Lizards, crocodiles, snakes
Insects
Mammals	Dogs, cows, cats, elephants, tigers etc.	·    Do not lay eggs; they give birth to young ones. Have  external earsHave hair on their body. Feed their babies on mother’s milk.

EARS IN ANIMALS

The ear is an organ responsible for the sense of hearing and balance.

Mammals (Humans)	External ears.One on each side of the head.Vary in shape but internal parts are usually similar to humans.
Cows, buffaloes, elephants, donkey and  horses	Long external ears
Monkeys, camels, cats, rats and dogs	Small external ears
Birds, snakes, lizards, frogs and insects.	Do not have external ears.
Birds – crow, hen, sparrow, duck, parrot etc.	Good sense of hearing.Their ears are small openings in the skull and are protected by feathers.
Lizards	Tiny holes on their heads for ears, if we look carefully.
Crocodile	Has ears like the lizard, but we cannot see them easily.
Elephant	Fan-like ears
Deer	Leaves- like ears
Rabbit	Ears on top of its head

Question and Anwers:

Q.1) Give reasons.

A.) Ear is an important organ for living beings. Why?

Ans) The ear is an important organ for living beings because the ear is an organ responsible for the sense of hearing and balance.

B.) Mammals have hair on their skin. Why?

Ans) Mammals have hair on their skin to:

1. Protect them.
2. Keep them warm against cold by conserving body heat.
3. Form pattern and make them unique

C.)The number of tigers is decreasing in India. Why?

OR

Tiger is our national animal, but it is endangered animal. Why?

Ans) The number of tigers is decreasing in India because:

1. Tigers are killed by hunters and poachers for their bonesand skin.
2. Trees are being cut and they lose their habitat.

Q.2) Name some animals that have ears which we cannot see.

Ans) Birds, snakes, lizards, frogs and insects.

Q.3) How does the skin help animals?

Ans) The skin of the animals helps them in the following ways:

1. The skin covers the body of the animals. It protects the internal organs.
2. It helps to keep our body at the right temperature.
3. It allows us to have the sense of touch.

Q.4) Give examples to show how different types of skin help different animals.

Ans) Different types of skin in animals:

	Polar bears and Yaks	Thick and furry skin to keep them warm
	Elephant & Buffaloes	Very little hair on their skin to keep them cool
	Tortoises	Shells on their back to protect them from danger
	Fish	Scaly skin to help them swim
	Porcupines & hedgehogs	Pointed spines that become erect when they sense danger

Q.5) Differentiate mammals and birds.

Difference between Mammals and birds:

	Mammals		Birds
	Mammals have hair or fur on their body.	1	Birds have feathers on their bodies.
	Mammals have paws, hands or hooves to move. (Bats are exceptional mammals that can fly.)	2	Birds have wings to fly.
	Mammals give birth to their young ones and feed them mother’s milk	3	Birds lay eggs. They done feed milk to their young ones.
	Mammals have external ears that may be big (like in an elephant) or small (like in humans)	4	Birds have ears which are small openings in the skull and are protected by feathers.

Q.6) Define:

1. Habitat

Ans) A habitat is the natural home or environment of a plant, animal or any other organism.

Why it is important?

Habitat provides the organisms that live there with food, water, shelter and space to survive.

2. Extinct animals

Ans) Extinct animals are those species which are no longer living and there will be no more animals alive on earth.

Examples: Dinosaur, Dodo, Quagga, The Great Auk, Green horned Rhino, etc.

3. Endangered animals

Ans) Endangered animals are animals that are in the danger of becoming extinct. An animal is considered endangered or ‘threatened’ when there are very few of them alive.

Examples: Asian elephants, tiger, snow leopards.

Q.7) Why do deer, giraffes, elephants and zebras have very little hair on the body?

Ans) Deers, giraffes, elephants and zebras live in warm areas and have less hair on their body to allow their skin to breathe easily and remain cool.

Q.8) Why do animals have different types of skin patterns?

Ans) Animals have different types of skin patterns because

• Each animal group is adapted to its specific environment and needs.
• Different animals have different patterns.
• These patterns are due to hair on their skin.

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