Earth is a special spot in the solar system for so many reasons – its sprawling continents, its blue seas, and its nearly limitless variety of ice-cream flavors. But one earthly thing stands out above the rest: its Earthlings. Ours is the only planet currently known to harbor life. In fact, Earth’s unique combination of air, water, and land nurtures life of every sort, from microscopic amoebas to submarine-size blue whales.
The Earth is the only inner planet (Mercury, Venus, Earth and Mars) to have one large satellite, the Moon. Mars has two very tiny moons. Mercury and Venus have none.
The Earth is fragile. Its surface is split into plates (tectonic plates) which float on a rocky mantle – the layer between the surface of the earth, its crust, and its hot liquid core. The inside of the Earth is active and earthquakes, volcanoes and mountain building takes place along the boundaries of the tectonic plates.
As a result of the Earth’s geological activity (the volcanoes and earthquakes) the surface of the Earth has far fewer craters than the surface of planets such as Mars, Venus and Mercury or the surface of the Moon. The craters have sunk down or been worn away by wind and rain over millions of years.
Picture Credit : Google