The world is a large, diverse planet that orbits the Sun in the Milky Way galaxy. It is made up of seven continents: Asia, Africa, North America, South America, Antarctica, Europe, and Australia. The Earth's surface is covered by about 71% water, primarily in the form of oceans, which play a crucial role in regulating the climate. Home to over 7 billion people, the world is rich in cultures, languages, and ecosystems. Different regions have unique climates, ranging from the tropical rainforests to the arctic tundra. The planet's biodiversity includes millions of species of plants and animals, many of which are still being discovered.