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WS Element of Month Oxygen IA

/www.wardsci.com/images/WS_Element%20of%20Month_Oxygen_IA.pdf

1 All About Elements: Oxygen http://wardsci.com https://wardsci.com/store wardsci.com | 800-962-2660 2 3 Fun Facts About… Oxygen 1. Oxygen constitutes 21% of our atmosphere, nearly half the mass of the earth’s crust and about two thirds of the hum...

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