Raintree fusion

Presents an introduction to light energy, in simple text with illustrations, describing how a beam of light travels from a star to the human eye.

Examines how people use the earth's natural resources such as water, trees, air, and oil.

Describes the formation, power, and warning signs of earthquakes and volcanoes and explains how to survive them, also discussing the Richter scale.

Illustrates the properties of gravity through ten experiments that could not be done in a classroom, involving activities such as dropping a watermelon from a helicopter, climbing a ladder into space, and taking a trip to the moon.

Presents an introduction to fossils, in simple text with illustrations, describing how they are formed, and what they tell us about the past.

Presents an explanation of electrical circuits, and looks at what can happen when the circuit is broken. Includes discussion of batteries and generators.

An exploration of the Indus River Valley that discusses what archaeologists have learned about how the Indus people lived and the important role of traders in Indus civilization.

Presents an illustrated history of the women who played crucial roles at home and overseas during WWII, including those in the Women's Army Corps "Rosie the Riveters," nurses, and USO volunteers, with information about peoples' attitudes toward the new roles they played and a glossary.

Examines roller coaster designs and the physical principles that make them work.

Photographs and illustrations describe the life cycle and migration patterns of the monarch butterfly.