9780761322573 | Twenty First Century Books, July 1, 2002, cover price $26.60 | About this edition: Explains the structure and function of DNA and discusses current relevant scientific research.
9780761332220 | Twenty First Century Books, November 1, 1998, cover price $26.60 | About this edition: Discusses the sources and uses of different types of energy, both natural and man-made, including electrical, magnetic, light, and heat
An informative addition to a science series discusses plate tectonics, the theory that the surface of the earth is always moving, and the connection of this phenomenon to earthquakes and volcanoes.
9780761332251 | Twenty First Century Books, November 1, 1998, cover price $26.60 | About this edition: Discusses plate tectonics, the theory that the surface of the earth is always moving, and the connection of this phenomenon to earthquakes and volcanoes
Examines global warming and the greenhouse effect, changes in earth's climate since its formation, the effects of these changes, and whether anything can be done to reverse them.
(view table of contents)
9780761322566 | Twenty First Century Books, February 1, 2003, cover price $26.60 | About this edition: Examines global warming and the greenhouse effect, changes in earth's climate since its formation, the effects of these changes, and whether anything can be done to reverse them.
Explores the universe and all of its elements, including the Milky Way, our solar system, the stars, and other astronomical bodies, and examines why it is important to continue studying the cosmos.
(view table of contents)
9780761322559 | Twenty First Century Books, February 1, 2003, cover price $26.60 | About this edition: Explores the universe and all of its elements, including the Milky Way, our solar system, the stars, and other astronomical bodies, and examines why it is important to continue studying the cosmos.
A detailed presentation of the structure and function of different types of cells and of research into developing technologies such as cloning and the use of stem cells.
(view table of contents)
9780761322542 | Twenty First Century Books, July 1, 2002, cover price $26.60 | About this edition: A detailed presentation of the structure and function of different types of cells and of research into developing technologies such as cloning and the use of stem cells.
9780822567998 | Revised edition (Twenty First Century Books, October 1, 2007), cover price $31.93 | About this edition: Discusses the three kinds of symbiosis--mutualism, commensalism, and parasitism--and describes examples of these relationships.
Explains the process of photosynthesis in plants and discusses such related issues as respiration, the carbon cycle, acid rain, and the greenhouse effect
9780761330004 | Twenty First Century Books, August 1, 1998, cover price $26.60 | About this edition: Explains photosynthesis, the process responsible for providing the material and energy for all living things, and discusses such related issues as respiration, the carbon cycle, acid rain, and the greenhouse effect.
9780761330028 | Twenty First Century Books, August 1, 1998, cover price $26.60 | About this edition: Explains various components of a food chain and discusses the concepts of food webs, umbrella species, biogeochemical cycles, and more.
9780822560579 | Twenty First Century Books, October 1, 2007, cover price $31.93 | About this edition: Explains how cells divide and multiply, how humans develop from a single cell to an adult, and how other living things grow.
9780761330011 | Twenty First Century Books, April 1, 1998, cover price $26.60 | About this edition: Discusses the three kinds of symbiosis: mutalism, commensalism, and parasitism and describes examples of these relationships
Explains various components of a food chain and discusses energy flows, food webs, food pyramids, recycling in nature, and the effect of humans on food chains.
9780822567974 | Revised edition (Twenty First Century Books, October 1, 2007), cover price $31.93 | About this edition: Explains various components of a food chain and discusses energy flows, food webs, food pyramids, recycling in nature, and the effect of humans on food chains.