Page 24 - ACTIVE SCIENCE 4 TOC

Reptiles

Snakes and lizards are reptiles that lay their eggs on the ground. But only some
eggs from the total number of eggs laid, hatch with the help of the warmth from

the sun. The rest are eaten by other animals.

Factual Study

• Grasshoppers produce music by

rubbing their hindlimbs together.

• Grasshoppers have ears on their
bellies.

A nimals Which Give Birth to Babies

Mammals are the animals that give birth to young ones.
They suckle their young ones with their milk after the birth.

Some common examples of mammals are cats, monkeys,
elephants, kangaroos, human beings, etc. Monkey

The young ones of the mammals develop completely
inside the mother’s body. When they are born, they have

hair on the body, they have well-developed brain, and
lungs to breathe. Some mammals like whales, dolphins,
etc., live in water. But most of the mammals live on land.

Dog, cow, monkey and rabbits are some examples of land
Dolphin
mammals. Whales and dolphins are the water mammals. They
are also called aquatic mammals.

Most mammals take care of their babies for long time. They

keep them safe, clean and provide them food. Mammals like
fish, whales, etc., do not take care of their young ones. They
leave them on their own.
Rabbit

Let’s Recapitulate
Factual Study
Fill in the blanks.
• Dolphins are intelligent
1. The larva that hatch from their eggs are called animals that display a wide
______________. range of unique behaviours.

2. Snakes and lizards lay their eggs on the • Sharks lay the biggest eggs in
______________. the world.

31
Active Science-4