What Is the Earth?

The earth is a huge ball, but how big is it? If we walk around it, we will cover 40,000 kilometres. On the earth, there are mountains, water, lands, oceans, human beings, animals and plants.

The earth is a planet. It revolves from west to east all the time. It takes 24 hours for the earth to make one complete turn. The earth also rotates around the sun. One circle takes one year and we grow one year older.