The earth is probably the only planet where life exists. This common home of all living creatures is round in shape. It was believed in the past that the earth was flat in shape. But Pythagoras, a great Greek mathematician, proved that it is round in shape. From the moon, the earth looks like a very bright big blue ball. It is about 25, 000 miles round.
The earth revolves constantly round the sun on its own orbit in the space. It takes one year to go round revolution, seasons change. At the same time, it spins like a top on its own axis. To complete a spin, it takes twenty-four hours. This causes day and night. The three-fourth of the earth's surface is covered with water and the one-fourth is land. The land portion provides crops, flowers, fruits etc. It is divided into continents and countries. The water surface is divided into four oceans.
In fact, we cannot live without water. Life has become possible on the earth only due to water. There are different uses of water in our daily life. There are so many beautiful things on the earth. There are snow-capped mountains, blue seas, lovely lakes and rivers, beautiful trees, men and animals. No other planet is perhaps so nice as ours is.
