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Alberta Curriculum - Science 9 Unit D: Electrical Principles and Technologies

My year of teaching environmental science without a textbook

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Human Touch Of Chemistry - Basic Concepts, Fun & Facts of Chemistry in Daily Life

The series of processes by which carbon compounds are interconverted in the environment, chiefly involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels.

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Environmental Chemistry: Water Treatment and Filtration - Green Chemistry Experiments - 3B Scientific