CLASS IV// EVS//SECOND CHAPTER//EAR TO EAR
SUMMARY NOTE:-
Ear :-
-
Ear is the organ that enables hearing means
help us to hear. In mammals, it helps in body balance.
-
In mammals, the ear is usually has three
parts—the outer ear, the middle ear and the inner ear.
-
Different animals have different kinds of
ears.
1.
An animals with ears like fans : Elephant
2.
An animals with ears like leaves : Rabbit
3.
An animals with ears on the top of its head :
Rabbit
4.
An animals with ears on both sides of its head
: Dog
5. An
animal with sharp and pointed ears : cat
- Women
like to decorate their ears with ear rings.
Visible ears and Invisible ears :-
-
Animals whose ears we can see, have visible/external/outer
ears. Example – deer, tiger, pig, buffalo, giraffe, elephant, cat, dog,
cow, goat, lion, donkey, horse, rabbit, monkey, man etc.
-
Some animal’s ears cannot be seen from outside,
they have invisible/internal/inner ears.
Example – birds (parrot,
crow, cuckoo, sparrow, duck, hen, duck etc.), insects (butterfly, mosquito,
lizard etc.), frog, snake, fish etc.
A bird’s ear :-
-
We can’t see a bird’s ears. Because birds
have invisible ears.
-
They have tiny holes on both sides of their
heads.
-
The holes are covered with feathers.
-
They help the bird to hear.
Ears in lizards :-
-
Lizards have tiny holes like birds.
-
These are their ears.
Ears in crocodile :-
-
Crocodiles also have invisible ears like
birds and lizards.
Animals having hair on their skin :-
-
The different patterns on the animals are due
to the hair on their skin.
-
If an animal did not have any hair on its
skin, there would be no patterns.
-
Those animals whose ears we can see, have
hair on their body.
Oviparous animals and viviparous animals :-
Oviparous or Egg laying animals :-
-
The animals who lay eggs are called oviparous
or egg laying animals.
-
Those animals that do not have ears on the
outside and do not have hair on their body, lay eggs.
-
Example – hen, peacock, crow, cuckoo, duck,
frog, sparrow, lizard etc.
Viviparous or Birth giving animals :-
-
The animals who give birth to young one are
called viviparous or birth giving animals.
-
Those animals whose ears we can see and have
hair on their body, give birth to young ones.
-
Example – human beings, mouse, elephant, cat, cow, dog, pig, buffalo, horse, monkey etc.
Ovo-viviparous animals:-
-
Ovoviviparous animals
produce eggs, but instead of laying them, the eggs develop and hatch inside the
mother's body and remain there for a time.
-
Example - sharks, rays, snakes, fishes, and
insects
National Park:-
-
National park is an area set aside by a
national government for the preservation of the natural environment.
-
There are 106 existing national
parks in India.
-
Some of those are
- Corbett National Park, Uttarakhand.
- Ranthambore National Park, Rajasthan.
- Kanha National Park, Madhya Pradesh.
- Bandhavgarh National Park, Madhya Pradesh.
- Dachigam National Park, Jammu and Kashmir.
- Gir National Park, Gujarat.
QUESTION ANSWERS
A.
FILL IN THE BLANKS :-
|
(head,
ears, love, leaves, Dodo, attention, tiny holes, feathers, no hair,
patterns, visible/external/outer)
|
1.
Usually
we cannot see the holes used for hearing by a bird because they are covered by feathers.
2.
If
an animal does not have outer hair, it will not have any patterns on
its skin.
3.
Crocodiles
and lizards hear by tiny holes on the sides of their heads.
4.
All
animals that give birth to their young ones have visible/outer/external
ears.
5.
Animals
not having visible ears can be recognised by having no hair on
their body.
6.
The
lizards have tiny holes on their heads which are their ears.
7.
A
buffalo has ears like leaves.
8.
A
human being has ears on both sides of his head.
9.
Our
pet needs our love and attention.
10.
Dodo is an extinct bird.
B. Match the type of pattern in Column A with the
animal in Column B by drawing arrows :-
Column A Column B
C. Complete this analogy :-
i.
Fan-like
ear : elephant :: leave-like ear : rabbit
ii.
Cow
: visible/external/outer ear :: Butterfly : invisible/internal/inner ear
iii.
Lizard
: invisible/internal/inner ear :: snake : invisible/internal/inner
ear
iv.
Hair
on skin : Cow :: Feathers on skin : Hen
v.
Peacock
: Oviparous :: Mouse: Viviparous
D. GUESS THE NAMES OF THE ANIMALS :-
a)
An
animal that looks like a little dinosaur- Lizard
b)
Our
National Animal- Tiger
c)
Our
national bird - Peacock
d)
Animals
give birth to young ones- Uttarakhand
e)
Animals
which lay eggs- Kerela
f)
Animals
which give us wool – Sheep
E. Tick the correct option:-
a) We (can/cannot) see the ears of a bird.
b) An elephant (lay eggs/gives birth
to their ones).
c)
The
different patterns found on (animals/birds) body are due to the hair on
their skin.
d)
The
(Lion/Tiger) is our national animal.
Or, The animals whose ears (can/cannot)
be seen from outside, (have/have no) hair on their bodies, (lay eggs/give
birth to their young ones.
F. Select the best option (MCQs) :-
i)
Which of the following animals has tiny holes on both sides of the head to hear?
(a) giraffe
(b) crow
(c) tiger
(d) donkey
ANS- (b) crow
(ii)
The .......... Has ears like fans.
(a) elephant
(b) monkey
(c) whale
(d) hen
ANS- (a) elephant
(iii)
The donkey has ears
(a) which cannot be seen (b) on the top of its
head
(c) on the sides of its head
(d) Both (a) and (c)
ANS- (b) on the top of its head
(iv)
The patterns by which animals may be recognised are due to
(a) colour of their skin (b) hair on their skin
(c) feel of their skin
(d) Both (a) and (c)
ANS- (b) hair on their skin
(v)
Now where do we see dinosaurs?
(a) Only in forests (b) Only in the zoo
(c) In films and pictures
(d) None of these
ANS- (c) In films and pictures
G. Write 'T' for True and 'F' for False statements:-
A.
Our
national animal is peacock. False
B.
A
fish has ears but we cannot see it. True
C.
Buffaloes
and cows have hair on their bodies. True
D.
Sheep
do not have hair on their bodies. False
E.
Squirrel
lays eggs. False
F.
We
can see the ears of a crocodile. False
G. All animals have ears. True
H.
The
number of tigers in India is decreasing day by day. True
I.
Dinosaurs
are extinct from the earth. True
J.
A
frog gives birth to babies and a monkey lays eggs. False
H. QUESTIONS WITH ANSWERS:-
1. What are the differences between visible and invisible
ear?
-
|
Visible ear |
Invisible ear |
|
Animals whose ears we can see, have visible ears. |
Some animal’s ears cannot be seen from outside, they
have invisible ears. |
|
These are also called external/outer ear. |
These are also called internal/inner ear. |
|
It has 3 parts; the outer ear, the middle ear and
the inner ear. |
It has only inner portion. |
|
Example – deer, tiger, pig, buffalo, giraffe,
elephant, cat, dog, cow, goat, lion, donkey, horse, rabbit, monkey, man etc. |
Example – birds (parrot, crow, cuckoo, sparrow,
duck, hen, duck etc.), insects (butterfly, mosquito, lizard etc.), frog,
snake, fish etc. |
2. What are the differences between oviparous and viviparous animals?
|
Oviparous animals |
Viviparous animals |
|
The animals who lay eggs are called oviparous animals. |
The animals who give birth to young one are called
viviparous animals. |
|
Those animals that do not have ears on the outside
and do not have hair on their body, lay eggs. |
Those animals whose ears we can see and have hair on
their body, give birth to young ones. |
|
They are also called egg laying animals. |
They are also called birth giving animals. |
|
They don’t feed milk to their young ones. |
They feed milk to their young ones. |
|
Example – hen, peacock, crow, cuckoo, duck, frog,
sparrow, lizard etc. |
Example – human beings, mouse, elephant, cat, cow,
dog, pig, buffalo, horse, monkey etc. |
3. Why do animals have different patterns on their body?
-
The
different patterns on the animals are due to the hair on their skin.
-
If
an animal did not have any hair on its skin, there would be no patterns.
4. Draw our national bird and write its name.
-
- Peacock
5. Name four ‘National Parks’ of our country.
- Corbett National
Park, Uttarakhand.
- Ranthambore National Park, Rajasthan.
- Kanha National Park, Madhya Pradesh.
- Bandhavgarh National Park, Madhya Pradesh.
- Dachigam National Park, Jammu and Kashmir.
- Gir National Park, Gujarat.
- The Great Himalayan National
Park, Himachal Pradesh.
6. Name two animals which give birth to babies.
- elephant,
cat, cow, dog, pig, buffalo, horse, monkey etc.
7. Name any two animals which have ears on the
sides of their head.
- tiger,
dog, cat.
8. How does a snake hear?
- Snakes
lack both an outer ear and middle ear. However, they have one middle ear bone
that connects the inner ear to the jaw. This enables snakes to hear vibrations,
such as a predator creeping closer on the forest floor.
9. What is the reason that animals can be
recognised by their skin?
-
The
different patterns on the animals are due to the hair on their skin.
-
Animals
can be easily recognised by the patterns on their skins.
-
Example- zebra has black stripes on its white
skin. Tiger has black stripes on yellow-brown skin.
10. How do birds hear?
-
We
can’t see a bird’s ears. Because birds have invisible ears.
-
They
have tiny holes on both sides of their heads.
-
The
holes are covered with feathers.
11.
How do lizards or crocodiles hear?
-
They
have tiny holes on both sides of their heads like the birds.
-
These
holes are their inner ears that help them in hearing.
12. Animals not having ears can still hear. How?
-
They
have tiny holes on both sides of their heads. They help them in hearing.
13.
Explain the similarities and differences between a bird and cow regarding their
bodies. How do they give birth to their babies?
-
Both
bird and cow are warm blooded animals means they can maintain their body temperature
with respect to their surroundings.
-
A
bird is smaller as compare to a cow. Bird has invisible ears, whereas cow has
visible ears.
-
Bird
lays eggs while cow gives birth to young ones.
14. Which is our national animal? Why its number is being decreased day by day?
- Tiger is our national animal.
- The number of tigers is going down in India because of several causes. Some of the causes are given here:
(a) People hunt them for their bones and skin.
(b) Because of deforestation, forests are disappearing which reduces their natural habitat.
KEEP LEARNING KEEP GROWING
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