The other three inner planets are Mercury, Venus, and Mars. The inner planets are also called the rocky planets, because they are made of rocks. The other part of Earth is made up of continents and islands which have different landforms on them. Examples of landforms are mountains and plains. Plants and animals can live on Earth, because it has so much water.
Earth spins very quickly compared to other planets.
It only takes Earth 24 hours to spin around its axis one time. Earth is the only planet in our solar system where humans, other animals, and plants can live. There is plenty of water to drink or to live in. Earth s clouds are made of water vapor. The air is perfect for plants to grow.