Introduces the main kinds of fish--jawless and jawed, and those with cartilage or bony skeletons--and explains how they are born, where they live, their enemies, and how they eat, protect themselves,
From the tiniest butterfly to the largest elephant, all animals are made up of cells. Readers will discover the amazing realities behind these microscopic creatures with vibrant pictures and simple di
Presents a history of the journals of Lewis and Clark, covering President Jefferson's intent for the explorers, and explains how the American Philosophical Society protects the original work.
Introduces the main kinds of reptiles--lizards and snakes, turtles and tortoises, crocodilians, and tuataras--and explains how they are born, grow, move, protect themselves, and reproduce, where and h
"During the 1930s and 1940s, the Nazi government in Germany carried out one of the greatest slaughters of human beings that the world has ever known. Led by dictator Adolf Hitler, the Nazis stirred up
Explains how genes and heredity are linked, how this information can be used to breed specific kinds of plants and animals, and the ethics involved in genetically engineering plants, animals, and huma
Explains the link between DNA, genetics, and heredity, describes how DNA works using RNA, and presents the applications of using DNA in forensic science and genetic engineering.
"Describes chemical changes, including the role of atoms and molecules, and highlights some of the commercial and consumer products that result from chemical change, such as plastics and dyes."
"Describes some of the different kinds of Earth's natural resources including air, water, soil, and the sun, and explains some nonrenewable natural resources including the fossil fuels of coal, natura
"Describes the process of erosion, including how the power of wind, water, and glaciers have changed the Earth's surface. Includes information on fossils."
Describes the elements, classes, and properties of minerals including color, streak, luster, hardness, and cleavage. Also explains minerals found in rocks such as feldspar, quartz and calcite.
Describes what waves are and how they impact human life, including ocean waves, shock waves, sound waves, light or electromagnetic waves, radio waves, and earthquake waves.
