What makes the Earth unique ?
Unlike the other planets of our solar system, life developed into many forms on the Earth after its emergence. Liquid water and oxygen for breathing made this possible. Millions species of plants and animals thrive today on land and in water. Water covers more than two-thirds of the Earth's surface. Therefore, the Earth appears blue from the moon or from the International Space Station. For this reason, it is also called the 'blue planet'. Till now, scientists have not discovered life in any other place in the universe, but they believe that one day they will do so.
🌍 Water is present on other planets as water vapour or ice.
How was the Earth formed?
The Earth, along with the sun and the remaining planets of our solar system, originated around 4.8 billion years ago from dust particles, which agglomerated gradually. At that time, the young Earth was bombarded by countless meteorites from space. The Earth's interior was molten and volcanoes erupted constantly. But over millions of years, the Earth's surface cooled down. Around 3.8 billion years ago, the temperature decreased to about 100°C and the Earth's crust slowly started becoming solid. At this time the gaseous cover on the Earth was mostly made up of water vapour.
🌍 the blue colour of the Earth is due to the copious amount of water present on it? Water is actually transparent, but deep water bodies 'absorb' the red and yellow rays of light.Therefore, only the blue rays get reflected and reach our eyes
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