Text Book Back Questions and Answers - Chapter 2 Life of Animals Term 3 4th Science Guide Samacheer Kalvi Solutions - SaraNextGen [2024-2025]

Updated On May 15, 2024

By SaraNextGen

Chapter 2 - Life of Animals - Term 3 - 4th Science Guide Samacheer Kalvi Solutions

Text Book Back Questions and Answers
I. WHO AM I?
Question $1 .$
My group is called colony
Answer:
Ant

Question $2 .$
Our home is nest
Answer:
Birds

Question $3 .$
My feet are broad to help me walk in the sand
Answer:
Camel

Question $4 .$
I use sound navigation to find the objects in my path
Answer:
Bats

Question $5 .$
I am active during day time as well as night time

Answer:
Lion

II. Fill In the blanks:
Question $1 .$
The animals which are active at night are called______
Answer:
Nocturnal animals

Question $2 .$

______is best known for parental care.
Answer:
Kangaroo

Question $3 .$
The group of owls are called ______
Answer:
Parliament

Question $4 .$

_______lives in hives.
Answer:
Bees

Question $5 .$

______bites us and sucks our blood.
Answer:
Vampire bats

III. Match the following :
Question $1 .$

Answer:

IV. Answer the following questions In brief :
Question $1 .$
Why do birds build nests?
Answer:
Birds build nests for their young ones.

Question $2 .$
What is meant by structural adaptation?
Answer:
Changes in the physical features of the animal are called structural 'adaptations.
Example: Polar bears living in cold climate have physical adaptations, such as thick fur and short ears to reduce heat loss.

Question $3 .$
Define echolocation.
Answer:
Bats produce ultrasonic sound which helps the bats find their way at night and find out the objects on their path. This is called "Echolocation".

Question $4 .$
How do ants feel the vibration?
Answer:
Ants feel the vibrations in the ground through their feet.

Question $5 .$
List out any three animals that live in groups.
Answer:
1. Lion
2. Elephants
3. Wild beast

Question $6 .$
Why do birds fly in 'V' shape?
Answer:
Birds fly in "V" shape to reduce wind resistance.

V. Give short answers:
Question $1 .$
Why do animals live in groups?
Answer:
Animals live in groups for
- Procuring food
- Taking care of young ones
- Protection from predators.
- Division of labour
- Energy conservation
- Finding mate easily

Question $2 .$
Explain the three main body regions of insect.
Answer:
Insects have three main body regions. They are; Head, thorax, and the abdomen. All parts of the insect are inside an exoskeleton.
1. Head: The main visible parts on the head are the large compound eyes, the antennae (feelers) and the mouth parts.
2. Thorax; It is the middle region of the body. It bears three pairs of legs and two pairs of wings.
3. Abdomen It is the last part of the insect body. Abdomen of most of the insects have clear segmentation.

Question $3 .$
What are nocturnal animals?
Answer:
- Some animals sleep in the day time and are very active at night. Such animals are called nocturnal animals. Example: Owl.

In Text Questions and Answers
Activity (Text Book Page No. 77)
Question $1 .$
Match the animals to their group behaviour

Answer:

Activity (Text Book Page No. 80)
Question $1 .$
Observe any animal in your surrounding and write a creative short story about it.

Answer:
I have a little dog named Tommy. He is a faithful dog to our family. He used to take care of me and my family. Mother always trust Tommy because he never allow anyone to touch me. Tommy is a really happy dog and loves going for walks and runs on the beach.
One unlucky day, he was hit by a car. One of his leg was severely injured. The doctors could not heal the injury. But the physical handicap does not make anyone useless, still he used to take care of me and my family with love.

Activity (Text Book Page No. 82)
Question $1 .$
Who am I?
Answer:

Activity (Text Book Page No. 83)
Question $1 .$
Fill in the missing words.
Answer:
Butterfly has three body parts like all other insects the head, the thorax (chest), and the abdomen (bottom). The butterfly has four wings and six legs are attached to the thorax. Butterfly use its two antenna to smell.

Activity (Text Book Page No. 84)
Question $1 .$
Place a few sugar cubes in a plate. After sometime, you can see some ants visiting the plate.
Answer:
Because ants have sense of sight, smell, taste $\&$ touch.

Activity (Text Book Page No. 85)
Question $1 .$
Word search puzzle - Nocturnal Animals

Answer:

Activity (Text Book Page No. 86)
Question $1 .$
Animal Observations

Answer:

Additional Questions and Answers
I. Choose the correct answers :
Question $1 .$
______have sensitive skin wich can feel even small vibrations in the water.
(a) Dolphins
(b) Fish
(c) Alligator
Answer:
(c) Alligator

Question $2 .$
________hold hands while they are sleeping so that they don't draft apart.
(a) sea horse
(b) sea otters
(c) sea monsters
Answer:
(b) sea otters

Question $3 .$
Giraffes have developed very long necks because of their ______
(a) environmental demands
(b) caring nature
(c) to protect from predators
Answer:
(a) environmental demands

Question $4 .$
The compound eyes of _______are made up of small units called ommatidia.
(a) birds
(b) insects
(c) fishes
Answer:
(b) insects

Question $5 .$

______ have thorns on their body to fight against their enemies.
(a) Tiger
(b) Deer
(c) Porcupines
Answer:
(c) Porcupines

II. Fill in the blanks :
Question $1 .$
Tigers and Zebras have lines so they can ______ themselves (admire / hide)
Answer:
Hide

Question $2 .$
______behaviour includes the activities of an animal and its interactions with other organisms. (Wild / animal)
Answer:
Animal

Question $3 .$

______dont build individual nests. (Social weavers / birds)
Answer:
Social weavers

Question $4 .$
Animals that are active during day time are known as ______animals. (diurnal animals / nocturnal animals)
Answer:
Diurnal animals

Question $5 .$
______increases the survival rate and improves the quality of young one. (parental care / education)
Answer:
Parental care

III. True or False:
Question $1 .$
Animals like elephants, squirrels do dream during sleep.
Answer:
True

Question $2 .$
All birds are the same in all activities
Answer:
False

Question $3 .$
Birds fly in $V$ shape to reduce wind resistance.
Answer:
True

Question $4 .$
Adaptation is the best essential factor of all living beings
Answer:
False

Question $5 .$
Dog shivers to generate more heat.
Answer:
True

IV. Match the following : 

Question 1. 

Answer:

1. $-\mathrm{C}$
2. $-a$
3. $-d$
4. $-b$

V. Answer the following:
Question $1 .$
Do all birds build nest?
Answer:
Not all the bird species build nests. Some of them lay their eggs on the ground or in gap between rocks.

Question $2 .$
Though green heron cannot swim, it stills cats fish from the water. How?
Answer:
It drops colourful leaves and fruits into the water. When the fishes pop out to investigate, the heron catches them.

Question $3 .$
What is group behavior?
Answer:
- Group behaviour is also called social behaviour.
- Members of the group work together to find food, defend themselves and look after the young ones.

Question $4 .$
Name the 3 main body segments of an insect.
Answer:
Insects have three main body regions. They are; Head, thorax and the abdomen.

Question $5 .$
What does the thorax contain?
Answer:
The thorax is the middle region of the body. It bears three pairs of legs and two pairs of wings.

Question $6 .$
How do vampire bats detect their prey?
Answer:
Vampire bats have heat-detecting noses which allow them to find their prey.

VI. Answer in detail :
Question $1 .$
Explain the three types of adaptations in animals.
Answer:
Three types of adaptations seen in animals. They are:
- Structural adaptations:
Changes in the physical features of the animal are called structural adaptations. Example: Polar bears Jiving in cold climate have physical adaptations, such as thick fur and short ears to reduce heat loss.
- Physiological adaptations:
Changes in the functions of the animal's body are called physiological adaptations.
Example: Dog shivers to generate more heat when it is cold and pants when it is hot.
- Behavioural adaptations:
Changes in the activities of the animal are behavioural adaptations. Example: Birds migrate to avoid adverse conditions.

Question $2 .$
Do animals have special sense? How does it help them? Give one example.
Answer:
Some animals have special senses and help the animals experience the world around them.
Ants
- Ants have sense of sight, smell, taste and touch.
- Ants have organs of smell and taste in their antennae.
- They feel the vibrations in the ground through their feet.
- Ants have a good sense of smell.

Question $3 .$
Write about bats
Answer:
- Bats have a good sense of hearing.
- They produce ultrasonic sound which helps the bats find their way at night and find out the objects on their path. This is called "Echolocation".
- Vampire bats feed on the blood of their prey.
- Vampire bats have heat-detecting noses which allow them to find their prey.