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Key Points

3 points

1

Water covered most of Earth three billion years ago.

2

Living tiny organisms began in the water.

3

Water's presence allowed Earth to develop life.

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Summary

The water helped tiny living things start to grow.

Because of water, Earth became the place we live on today.

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New Words to Learn

4 words

evolution

how living things slowly change over a very long time

billion

the number 1 followed by nine zeros, a huge amount

organisms

tiny living things, like tiny plants or animals

shaped

made something in a certain way

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