Agujeros negros (Black Holes)

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

Find out how tools have helped people hunt, build, and make life easier in this engaging, Spanish-translated nonfiction title. With colorful images, timelines, charts, a glossary to assist with vocabulary improvement, and an index, children will learn how tools throughout time have made such an important impact on life as we know it! Featured eras include the Stone Age and the Industrial Revolution.

Describes the life and work of the scientist who was persecuted by the Inquisition for his views of the universe.

How does a liquid become a gas? Through evaporation! Evaporation helps make puddles disappear after it rains. In this Spanish-translated book, learn all about evaporation and how it happens. This 6-Pack includes six copies of this title and a lesson plan.

Where Do You Come From? Learn About Heritage And How To Build Your Own Family Tree. Social Studies Based Leveled Readers For Use In Guided Reading And Social Studies Instruction.