4th Science Guide Term 3 Lesson 2 Life of Animals

4th Science Guide Term 3 Unit 2 Life of Animals – Book Back Answers – English Medium

4th Science Guide Term 3 Lesson 2 Life of Animals. 4th Standard Science Guide Term 3 Lesson 2 Book Back Question and Answers Download PDf English Medium. 4th Science Term 3 English Medium Book in answers. 4th All Subject Book Back Answers. 

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4th Standard Science Guide Term 3 Chapter 2 Life of Animals – English Medium

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 :

1. Why do birds build nests?

Answer:

• Birds build nests for their young ones.

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.

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”.

4. How do ants feel the vibration?

Answer:

• Ants feel the vibrations in the ground through their feet.

5. List out any three animals that live in groups.

Answer:

1. Lion
2. Elephants
3. Wild beast

6. Why do birds fly in ‘V’ shape?

Answer:

• Birds fly in “V” shape to reduce wind resistance.

V. Give short answers :

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

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.

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.

4th Science Guide Life of Animals In Text Questions and Answers

Activity (Text Book Page No. 77)

1. Match the animals to their group behaviour

Activity (Text Book Page No. 80)

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)

1. Who am I ?

Answer:

Activity (Text Book Page No. 83)

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)

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)

1. Word search puzzle – Nocturnal Animals

Answer:

Activity (Text Book Page No. 86)

Question 1.

Animal Observations

Name of the animal         What is the adult doing? What is the young one doing?

Answer:

4th Science Guide Life of Animals Additional Questions and Answers

I. Choose the correct answers :

Question 1.

___________ have sensitive skin wich can feel even small vibrations in the water.

Answer:

(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 sleepAnswer:True

Question 2.

All birds are the same in all activitiesAnswer: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 beingsAnswer:False

Question 5.

Dog shivers to generate more heat.Answer:True

IV. Match the following :

Question 1.

Answer:

1. c
2. a
3. d
4. b

V. Answer the following :

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.

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.

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.

4. Name the 3 main body segments of an insect.

Answer:

• Insects have three main body regions. They are; Head, thorax and the abdomen.

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.

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 :

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.

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.

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.