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CK-12 Earth Science For Middle School covers the study of Earth - its minerals and energy resources, processes inside and on its surface, its past, water, weather and climate, the environment and huma ...
Hipervinculo Química
CK-12 Chemistry - Basic is a NEW high school FlexBook® textbook covering Scientific Method, Matter, Atomic Structure, Elements, Chemical Reactions, Stoichiometry, Chemical Kinetics, Physical States of ...
Hipervinculo Biología
CK-12 Biology is a high school FlexBook® textbook covering cell biology, genetics, evolution, ecology, microorganisms, fungi, plants, invertebrates, vertebrates, and physiology.
It is an educational co ...
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