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Earth & Space Science

Reading Levels These books contain three developmentally appropriate reading levels for each grade span.

Low
Mid
High

Each level of the book conveys similar concepts, images, and vocabulary.

The Solar System

© Orlando Rosu/123RF

The Solar System

Our solar system is home to Earth and seven other planets. Each planet rotates on its own axis while revolving around the Sun. Every planet has unique characteristics and qualities that set it apart from the rest. The Sun keeps this complex arrangement in order. This unit reveals detailed facts about our Sun and the planets. It also addresses other components of our solar system, including dwarf planets, moons, asteroids, and comets.

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