"The body may not be very active during sleep, but the mind has an important job to do. Sleep is a crucial function for all complex animals, yet there are still many questions to be explored. Why do we sleep? Why might it help our memory? Why do we dream?"--Publisher.
Provides an overview of the state of Montana, covering its history, geography, government, economy, people, and culture. Includes maps, facts, and a timeline.
What is the world's tallest waterfall? How do dams help generate water power? What happens when a waterwheel spins? This series explores the causes and effects that shape our world. From the underwater volcanoes that sprout into islands, to the rushing waterfalls that spark electric currents, this series demonstrates how both natural and man-made phenomena occur.
This title explains what happens when cells divide. Cell division is the way in which organisms grow. Even when an organism is fully grown, some cells continue to divide to replace those that have become old or damaged. This book explores the complex relationship among chromosomes, genes, and DNA. It then examines the special form of cell division involved in reproduction, and how characteristics are passed on from one generation to another so that a pig gives birth to piglets and not kittens!
Paperback
(Capstone Global Library Ltd, Feb. 1, 2012)
Part of a series which looks at scientists - men and women, historical and modern, from a range of cultures - who have made major advances and affected the way we live.
The science of energy is at the root of many of the biggest challenges facing the future of our planet. This book uses everyday examples and the latest figures to show how we use energy alternatives. Find out how hybrid cars work and what each of us can do to save energy. Learn the drawbacks of alternative sources of energy.