Raintree fusion

Examines the importance of the water cycle, and describes how water can be a solid, liquid, or gas as well as the process of evaporation and condensation.

Describes the roles of slaves, soldiers, gladiators, and emperors in ancient Rome and discusses the dangers they faced.

Presents a short study of states of matter, and examines mass, density, and volume; physical and chemical changes; buoyancy; and more.

Examines what sounds are made of and how they work, and describes sound waves, vibrations and pitch, loudness and decibels.

An introduction to the ancient Greek Olympics that covers athletes, Olympia, events, ceremonies and feast, prizes and rewards, the modern Olympic Games, and the marathon. Includes a time line, a glossary, and resources.

Presents an introduction to the concept of force and motion, in simple text with illustrations, describing the different physical forces in action during various extreme sports.

Presents a study of the food chain and describes the feeding habits of the Great White shark.

Examines segregation and civil rights, providing information about Jim Crow laws, the NAACP, Brown versus the Board of Education, school integration, protests, the Civil Rights Act, and prominent people from the era.

Examines immigrant life in New York City from 1835 to 1935, providing information about tenements, neighborhoods, work, recreation, and schools.

Examines the Industrial Revolution, providing information on inventions, types of employment, child labor, immigration, and prominent people of the era.