Surveys the many uses of plants, including nutrition, fuel, building, gardening, and medicine.

How did ancient people manage to find light sources? How do we know about light-based theories such as prisms? This fascinating book looks at the historical controversies that surround the discovery and theories of light and tells the stories of the scientists who worked on them. It also examines how the different theories based on light were arrived at, how they were tested, and what impact these theories and discoveries have had on our understanding...

Discusses what paleontologists do, how they find fossils, and what it takes to become a paleontologist.

"All materials can exist in different states, but what are the differences, and how do materials change from one state to another? This book explores solids, liquids, and gases, looking at their properties and the processes involved in changing state"--From the publisher's web site.

Look inside a burrow and discover a world of inhabitants! A close look at this microhabitat reveals an unbelievable variety of organisms. Vibrant photographs and detailed illustrations combine to make these books informative and engaging. A visual table of contents helps readers navigate the text, and informative labels make the photographs valuable sources of information.

Discusses biomass fuel as an energy resource, describes how biomass is turned into electricity and biofuels, and explains the advantages and disadvantages to using biomass energy.

Takes a look at emotions and how they affect our development.

"An introduction to the properties of energy for third and fourth graders; includes hands-on activities"--Provided by publisher.