Earth Born!
The Earth came from a cloud in space.
Scientists think the Earth formed from a huge cloud of gas and dust around 4500 million years ago. A star near the cloud exploded, making the cloud spin. As the cloud spun around, gases gathered at its center and formed the Sun. Dust whizzed around the Sun and stuck together to form lumps of rock. In time the rocks crashed into each other to make the planets.
The Earth is one of these planets.
At -first the Earth was very hot.
As the rocks crashed together they warmed each other up. Later, as the Earth formed, the rocks inside it melted. The new Earth was a ball of liquid rock with a thin, solid shell.
Huge numbers o-f large rocks called meteorites crashed into the Earth.
They made round hollows on the surface. These hollows are called craters. The Moon was hit with rocks at the same time. Look at the Moon with binoculars — you can see the craters that were made long ago.
( The Moon was also hit by rocks in space, and these made huge craters, and mountain ranges up to 5000 meters high.)
The oceans and seas formed as the Earth cooled down.
Volcanoes erupted, letting out steam, gases and rocks from inside the Earth. As the Earth cooled, the steam changed to water droplets and made clouds. As the Earth cooled further, rain fell from the clouds. It rained for millions of years to make the seas and oceans.
(Erupting volcanoes and fierce storms helped form the atmosphere and oceans .These provided energy that was needed for life on Earth to begin.)
VIDEO
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AMAZING FACT
Millions of rocks crash on the Earth as it speeds through space.
Some arger ones may reach the ground as meteorites.
Where did the Earth come from?
