ocr: Planet Earth Fach planet of the Sular system is unique in its own right, yet Earth has a whole set of really unique features. First, it is the only active planet the earthquakes and volcano eruptions constantly change its appearance Second, it is the only planet that boasts vast resources of liquid water: it's too hot for that on Venus and too cold on Mars. The Earth's atmosphere is also very unlike any other planet's 's gaseous shells. Earth neighbors' atmospheres consist mainly of carbon dioxide, while the Earth's contains great amounts of oxygen and nitrogen, which form shield from the most ...