Find out how machines can change a small force into a large force. What happens when forces are balanced? Why do moving things slow down? What are the benefits of friction? Includes three simple activities or experiments to try.

Describes the causes and effects of forest and bush fires, case studies of past fires, how they are fought, and how they can be predicted or prevented in the future.

Why do apples fall to the ground? What stops atoms from flying apart? Why don't submarines sink? Investigate the curious world of physical science. Find out for yourself about Forces and Motion through experiments that you can do at home. Learn why some balls are better to use in certain games. Find out how a person can lift a car. Forces and Motion will show you the importance of investigating and understanding the physical world around you.

Discusses how amphibians differ from other animals, their habitat, how they are born and develop, what they eat, how they reproduce, and their typical life expectancy.

Find out all of the answers to questions you have about the sun!

Describes the physical characteristics, life cycle, habitat, and individual and group behavior of the chimpanzee.

Answers common questions about blood and the circulatory system.