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Provides The History Of Biofuels, Different Uses, Positive And Negative Characteristics, And How They Will Impact The Future.

"Discusses the role of the oceans on Earth and introduces waves, tides, and water pressure"--Provided by publisher.

Pterodáctilos son una de las criaturas más fascinantes de la antigüedad. Este texto incluye hechos fascinantes acerca de estos folletos lujosos en un formato accesible. Diagramas, preguntas de pensamiento crítico y otras características inspiran el aprendizaje visual y el compromiso. Pterodactyls are one of the most fascinating ancient creatures. Now in Spanish, this carefully leveled text includes fascinating facts about these fancy flyers in an accessible format. Diagrams, age-appropriate critical thinking questions, and other features inspire visual learning and engagement.

Cyclists Zoe and Kate are friends and athletic rivals for Olympic gold, while Kate and her husband Jack, also a world-class cyclist, must contend with the recurrence of their young daughter's leukemia.