Planet Earth (scientific concept)

Planet Earth is the third planet from the Sun in our solar system and the only known planet to support life. It has a solid, rocky surface covered mostly by water, with a thin atmosphere composed of gases like nitrogen and oxygen that protect and sustain living organisms. Earth's surface is constantly changing due to processes like erosion, plate tectonics, and weather. It has diverse climates, ecosystems, and habitats, creating the rich variety of life we see today. Earth's position, composition, and dynamic processes make it unique and vital for life as we know it.