Page 43 - Key to Social Studies 3

Let’s Connect

Did the Earth Always Look Like How It Is Now?

Nearly 335 million years ago, the Earth

was in the form of a big supercontinent.

This supercontinent was called

Pangaea. Pangaea was basically the

continents of our modern world but all

connected into one massive body Before

surrounded by a superocean. About 175

million years ago, it began to break up

and gradually divide over millions of

years to become close to the Earth we

live on today.

Planet Earth: The Beginning

After

For almost one billion years, there

was no life of any form on Earth.

3.5 billion years ago, some tiny

organisms that couldn’t be seen by

the naked eye started to appear.

They have marked the rst sign of

life on the planet.

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