Do you think you know your world well?

Well, here are some amazing facts about our world that will help you know the universe you belong to…

The center of the earth is about 6,400 kilometers beneath our feet. It is nearly 13,000 kilometers to the other side of the world. Even if anyone invented a machine that could dig that far into the earth, it would not be able to go through the middle of the earth. The earth’s middle is made of rock so hot that it melted.

When the outside surface of the cooled down, long ago, it became like a shell of rock. This is the crust of the planet. The oceans and continents are on the top of this crust.

Below the ocean the crust is only 8 kilometers thick; and on dry land the crust is about 32 kilometers thick.

When you look at the map of the world we think that the continents have always been in the same places. For a long time this is what everyone believed. However, no most scientists think that long ago all the continents were joined together. This was the first continent, and all the scientists call it Pangaea.

180 million years ago the original Pangaea split into two big continents. They began to break free from each other.

135 million years ago North America began to move away from Europe. India began to move northwards towards Asia and Africa began to separate from South America.

65 million years ago South America was completely separated from Africa and drifted away to the north and west. The Atlantic Ocean began to become wider.

In present time, India has collided with Asia. South America has joined with North America. Australia has broken away from Antarctica.

For millions of years the earth’s atmosphere has not changed very much. Layers of gases have protected the earth from the harmful effects of the sun’s rays. Everyday we burn huge amounts of wood, coal, oil and gas. When they burn, these fuels give off a gas called carbon dioxide.

Related posts:

1. Facts About Earthquakes Earthquakes are movements of the Earth’s surface, often as a...

Related posts brought to you by Yet Another Related Posts Plugin.