Class 4 Science Lesson 5

Exercise

1. Match the following: 

Tiger → Cub

Buffalo → Calf

Dog → Pup

Rhino → Kid

Cow → Calf

Horse → Foal

Sheep → Lamb

2. Fill in the blanks with the correct words given below.

(Words: Caterpillar, Short, Chick, Adult, Pupa, Life cycle, Sprout)

a) The sequence of stages from birth to death of an organism is called life cycle.

b) The life cycle of small organisms is short.

c) The four stages of the life cycle of insects include egg, larva, pupa and adult, respectively.

d) The larval stage of a butterfly is called caterpillar.

e) The seed of the plant germinates and a sprout appears after sowing in the soil.

f) Chicken’s baby is called a chick.

3. Answer the following questions:

a) What is life cycle?

Ans👉 The life cycle is the continuous process of birth, growth and death that occurs in every living being in the world. It includes all evolutionary stages from the beginning of life to the end. This process is seen in both plants and animals.

b) What are the stages of human life cycle?

Ans👉 Human life cycle begins from birth and moves through different stages such as childhood, adolescence, adulthood and old age, finally ending in death. These stages show how a human grows, matures and eventually completes their life span.

c) Write the names of different stages of the pigeon’s life cycle.

Ans👉 The different stages of a pigeon’s life cycle include:

Egg
Chick
Young pigeon
Adult pigeon

d) What are the stages in the life cycle of an insect?

Ans👉 Insects like butterflies go through four main stages in their life cycle. These stages are:  

Egg
Larva (caterpillar)
Pupa
Adult butterfly

e) Write the names of different stages life cycle of a bean plant.

Ans👉 The life cycle of a bean plant includes several stages from seed to maturity. It begins with a seed which germinates to form a sprout. The sprout grows into a seedling, which becomes a sapling. The sapling then becomes a mature plant, flowers bloom and finally fruits are formed that contain seeds.

f) Write the name of the stages of the life cycle of spinach.

Ans👉 The spinach plant goes through the following life cycle stages: seed, germination, seedling, mature plant, flowering and finally seed formation again.

g) Name the babies of the following animals:

Ans👉 The baby names of the listed animals are:

Swan – Cygnet
Cow – Calf
Elephant – Calf
Rhino – Calf or Kid
Fish – Fry
Frog – Tadpole
Lion – Cub
Butterfly – Caterpillar (larval stage)

h) Write the different stages of the frog in a sequence.

Ans👉 The life cycle of a frog goes through the following stages:

Egg
Tadpole
Tadpole with legs
Froglet
Adult frog

i) Draw a clear picture of the butterfly’s life cycle and write the name of each stage.

Ans👉 The butterfly completes its life cycle in four main stages:

Egg
Larva (Caterpillar)
Pupa
Adult Butterfly