As far as we know, Earth is the only planet in the Solar System that has life. As well as warmth from the Sun, the other main ingredient for life is liquid water. Earth has plenty of water – in total, it covers about three-quarters of the planet’s surface!
Is it true? There was life on Earth from the start.
No. When Earth first formed it was extremely hot and there was no oxygen. Over millions of years, the planet cooled, oceans formed and oxygen was made. The first life on Earth appeared about 3 billion years ago.
What does Earth look like from space?
It looks beautiful – blue with swirling white clouds. Astronauts in space spend most of their free time gazing at it. They can even make out cities, when they are lit up at night with twinkling lights.
Amazing! The Earth is magnetic. At the centre of the Earth is a core of a molten metal called iron, which makes our planet like a giant magnet. This is what pulls the needle on a compass towards the magnetic North Pole.
Why does our sky go dark at night?
Like all planets, the Earth is spinning as it orbits the Sun. When your part of the planet is facing away from the Sun, its light is blocked out. At the same time, it is daytime for people on the opposite side of the Earth.
Picture Credit : Google