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1 All About Elements: Nitrogen http://boreal.com 2 3 boreal.com | 800-387-9393 Fun Facts About… Nitrogen 1. Nitrogen is the fourth most abundant element in the universe and it makes up the majority of the earth’s atmosphere at a staggering 78 perc...

1 All About Elements: Oxygen http://boreal.com boreal.com | 800-387-9393 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 human body. It is the third most...

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 huma...