The Life Cycles of Animals
Name:
Class:
Consolidation Worksheet
Date:
1
Why Do Animals Reproduce?
Tick (ü) the boxes next to the statements that are TRUE.
66
1
Living things reproduce to ensure the continuity of their own kind.
2
A life cycle is made up of all the stages of an animal’s life.
3
All mammals give birth to their young alive.
4
Not all fishes lay eggs.
5
The life cycles of animals and the life cycles of plants are the same.
Additional Teacher’s Resources
© 2012 Alston Publishing House Pte Ltd
The Life Cycles of Animals
Name:
Class:
Consolidation Worksheet
Date:
2
What Are the Life Cycles of
Some Animals?
Complete the flowchart below by filling in the missing words in the
boxes. Use the words below to help you. Each word or words can be
used only once.
Mealworm
Four stages
Laying eggs
Cockroach
Chicken
Rabbit
Ways of Reproduction
Giving birth to
young alive
such as
Have life cycles with
Three stages
such as
© 2012 Alston Publishing House Pte Ltd
such as
• Frog
• Butterfly
•
• Mosquito
•
•
Science SMART Teacher’s Guide Grade 4
67
The Life Cycles of Animals
Name:
Class:
Consolidation Worksheet
3
Date:
Why Do Young Grow Up to Look Like
Their Parents?
Which of the following characteristics can be inherited? Which of them
cannot be inherited? Complete the flowchart below.
Eye colour
Nail length
Hair length
Single or double eyelids
Scars
Dimples
Characteristics
Can be inherited
68
Additional Teacher’s Resources
Cannot be inherited
© 2012 Alston Publishing House Pte Ltd
The Life Cycles of Animals
Name:
Fun and
Games
Class:
Date:
Can You Spot Them?
The young of some animals look like their parents, while the young of
other animals do not. Spot the animals and their young. Circle each pair
or group of adult animals and their young with a different colour.
© 2012 Alston Publishing House Pte Ltd
Science SMART Teacher’s Guide Grade 4
69
The Life Cycles of Animals
Name:
Class:
Date:
Exam Practice
Process skills: Observing, Inferring
Tom visited a farm. He saw a hen sitting on its eggs.
a. Why did the hen sit on its eggs?
[1 mark]
b. Tom knows that chicken eggs must be kept at a temperature of
about 41 °C for 21 days for the chicks to develop. He built a simple
machine as shown below to keep eggs warm. He bought three
fertilised chicken eggs from the farm and placed them inside the
machine. He observed the eggs for 21 days. However, after 21 days,
the eggs did not hatch into chicks.
Air holes
Wire mesh
Bowl of water
What could be the reason why the eggs
did not hatch?
[1 mark]
70
Additional Teacher’s Resources
Egg
Lightbulb
Styrofoam box
Hint:
How does the temperature
affect how the chicks in
the eggs develop?
© 2012 Alston Publishing House Pte Ltd
© 2012 Alston Publishing House Pte Ltd
Science SMART Teacher’s Guide Grade 4
71
1
Class:
A life cycle is made up of all the stages of an animal’s life.
All mammals give birth to their young alive.
Not all fishes lay eggs.
The life cycles of animals and the life cycles of plants are the same.
2
3
4
5
✓
✓
✓
Answers to Additional Teacher’s Resources
Living things reproduce to ensure the continuity of their own kind.
Date:
1
Tick (ü) the boxes next to the statements that are TRUE.
Why Do Animals Reproduce?
Consolidation Worksheet
Name:
The Life Cycles of Animals
2
Class:
Date:
Rabbit
• Mosquito
• Mealworm
• Chicken
• Cockroach
The Life Cycles
of Animals
Answers to Additional Teacher’s Resources
• Butterfly
such as
such as
• Frog
Four stages
Three stages
Have life cycles with
such as
Chicken
Rabbit
Laying eggs
Ways of Reproduction
Laying eggs
Cockroach
Giving birth to
young alive
Mealworm
Four stages
Complete the flowchart below by filling in the missing words in the
boxes. Use the words below to help you. Each word or words can be
used only once.
What Are the Life Cycles of
Some Animals?
Consolidation Worksheet
Name:
The Life Cycles of Animals
3
Class:
Date:
Additional Teacher’s Resources
Scars
Single or double eyelids
Cannot be inherited
Nail length
Hair length
Scars
Eye colour
Single or double eyelids
Dimples
Dimples
Hair length
Can be inherited
Characteristics
Nail length
Eye colour
Which of the following characteristics can be inherited? Which of them
cannot be inherited? Complete the flowchart below.
Why Do Young Grow Up to Look Like
Their Parents?
Consolidation Worksheet
Name:
The Life Cycles of Animals
Answers to Additional Teacher’s Resources
Can You Spot Them?
Class:
Date:
Pupils should circle each pair or group of adult
animals and their young with a different colour:
farmer and girl; frog and tadpoles; chicken and
chicks; cow and calf; butterfly and caterpillar.
The young of some animals look like their parents, while the young of
other animals do not. Spot the animals and their young. Circle each pair
or group of adult animals and their young with a different colour.
Fun and
Games
Name:
The Life Cycles of Animals
Answers to Additional Teacher’s Resources
Chapter 1
72
© 2012 Alston Publishing House Pte Ltd
© 2012 Alston Publishing House Pte Ltd
Science SMART Teacher’s Guide Grade 4
73
Class:
[1 mark]
Date:
How does the temperature
affect how the chicks in
the eggs develop?
Hint:
Styrofoam box
Lightbulb
Egg
Answers to Additional Teacher’s Resources
for the chicks inside the eggs to develop.
The machine did not provide enough warmth
What could be the reason why the eggs
did not hatch?
[1 mark]
Bowl of water
Wire mesh
Air holes
b. Tom knows that chicken eggs must be kept at a temperature of
about 41 °C for 21 days for the chicks to develop. He built a simple
machine as shown below to keep eggs warm. He bought three
fertilised chicken eggs from the farm and placed them inside the
machine. He observed the eggs for 21 days. However, after 21 days,
the eggs did not hatch into chicks.
the eggs to develop.
To provide warmth for the chicks inside
a. Why did the hen sit on its eggs?
Tom visited a farm. He saw a hen sitting on its eggs.
Process skills: Observing, Inferring
Exam Practice
Name:
The Life Cycles of Animals
The Life Cycles
of Animals
Chapter 1
Glossary
Chapter 1:
The Life Cycles of Animals
Cocoon
The protective casing which some insects make for themselves while
they grow in their pupal stage
Gene
The part of the cell that controls or influences the physical
characteristics of a living thing, and can be passed down from parents
to their young
Heredity
The passing down of traits from parent to child
Larva(plural: larvae) The newly hatched young of an insect that is wingless
and worm-like
74
Life cycle
The stages through which a living thing goes through in its life, from the
beginning of its life, to undergoing changes, reaching maturity as well
as reproduction
Metamorphosis
A great change in appearance in some animals when they become an
adult
Moult
Shed the old skin or covering and replace it with new growth so that the
body can grow bigger
Nymph
The young insect that looks almost like the adult except that it is smaller
and has no wings
Pupa
The stage of development between larva and adult, during which the
larva does not eat and undergoes complete transformation within a
cocoon
Trait
A characteristic or condition
Glossary
© 2012 Alston Publishing House Pte Ltd