The Earth is the third closest planet to the sun and is approximately 12,756.3 km around. It appears as a round, blue marble when viewed from space. Some key aspects that make Earth special include the presence of air, living things like plants and animals, and features such as flowers and trees. An interesting fact is that Earth is the only known planet in our solar system that supports life. The document was written by a 7-year-old girl named Jocelin who enjoys activities like swimming, skating, and playing with friends.