Hi! I am Studyfin, your science tutor. Today, we will explore our amazing solar system and learn how authors write about it!
Our solar system has one star, eight planets, and many smaller objects. The Sun is at the center, and its strong gravity keeps all the planets orbiting around it.

When authors write about space, they have a purpose. The author's purpose is the main reason they wrote the text, like to teach us facts about how planets move.
Authors use text structures to help us understand. For example, a description structure lists facts, while a cause-and-effect structure explains how gravity causes planets to orbit.
Read this short passage: 'The Sun is huge. Because the Sun has so much mass, its gravity pulls on the Earth. This pull keeps our planet from floating away into cold, deep space.' Explain the author's purpose and how the text structure helps show the message.
- Find the author's main message. The text explains that the Sun's gravity keeps the Earth close and safe.
- Identify the author's purpose. The purpose is to explain how gravity keeps our planet in place.
- Look at how the text is built. It uses a cause-and-effect structure. The cause is the Sun's huge gravity. The effect is that Earth does not float away.
- Connect the structure to the purpose. The cause-and-effect structure makes it easy to see how the Sun directly controls Earth's path.
