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OLogy Card 213 respiration and breathing Most living things need oxygen to survive. Oxygen helps organisms grow, reproduce, and turn food into energy. Humans get the oxygen... Article Article: An Ode to O Where would the world be without oxygen? While it's hard to imagine an Earth without it, for nearly the first half of the planet's... Video The Rise of Oxygen Oxygen is the key to Earth's biodiversity. But it wasn't always so. Video Life in Water: Vertebrates - Breathing Fish are among the few vertebrates that can breathe underwater. Like humans, fish need oxygen to survive—but water contains far less... Article Article: Earth Without Oxygen Where would the world be without oxygen? While it's hard to imagine an Earth without it, for nearly the first half of the planet's... Exhibit Banded Iron Formation A nearly 3-billion-year-old banded iron formation from Canada shows that the atmosphere and ocean once had no oxygen. Exhibit An evolving atmosphere About 1.7 billion years ago, banded iron formations — sedimentary rocks consisting of iron-rich layers alternating with iron-poor... Exhibit Pyrite-bearing conglomerate This quartz-pebble conglomerate is from one of the oldest layers of the Huronian Super-group. Article Incomparable Gold Gold, by any standard, is unusual. It resists chemical corrosion and tarnish-attack by acids and oxygen. It is highly reflective... Exhibit Red quartzite The rocks in the upper part of the Huronian Supergroup are red-brown, like this quartzite specimen. Educator Materials Classroom Discussion Activity   Article Harboring a Problem: Investigating Changes in Dissolved Oxygen Levels at King Harbor in Redondo Beach, CA  
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