Simple text and photographs present information about the planet Mercury.

Simple text and photographs present information about the planet Jupiter.

Simple text and photographs present information about the planet Pluto.

Simple text and photographs present information about the planet Earth.

Unlike most other planets, Venus can be seen from Earth's surface with the naked eye. Only the moon burns brighter in the night sky. Readers will learn why Venus's thick clouds help make the planet so hot and why its days last so long. They will also get an up-close look at Venus's remarkable land features and find out how scientists have studied the harsh surface of the planet.

Discusses the meaning and purpose of a constitution; recounts reasons why people thought the United States needed one in the 1780s and the events of the Constitutional Convention; and describes the Constitution's main points and how it has changed.

"Learn all about the history of computers, from how they were first invented to how they impact our lives today."--

Simple text and photographs introduce the respiratory system and its purpose, parts, and functions.

Explains what a constitution is, discusses why the thirteen American colonies felt the need for a central government, introduces five framers of the U.S. Constitution, describes the convention at which the document was created, and considers the relevance of the Constitution in the modern world.