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
9780822586548 | Twenty First Century Books, October 1, 2008, cover price $31.93 | About this edition: Explains the structure and function of DNA and discusses current relevant scientific research.
Product Description: Discusses the sources and uses of different types of energy, both natural and man-made, including electrical, magnetic, light, heat, sound, and nuclear energy.
9780822586555 | Twenty First Century Books, August 8, 2008, cover price $31.93 | About this edition: Discusses the sources and uses of different types of energy, both natural and man-made, including electrical, magnetic, light, heat, sound, and nuclear energy.
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.
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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.
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.
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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.
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
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.
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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.