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�� ♪ Around three billion years ago, Earth's oceans were packed full of dissolved metals. Metals like iron. This key that we see here is rusty, and in order to form rust we need three ingredients. The first is iron, which is what this key is made of, the second is water, or water vapor in the air, and the third crucial ingredient is oxygen. NARRATOR:And in Earth's early oceans, oxygen began to react more andmore with iron and other metals, as cyanobacteriaspread across the oceans. ♪ ♪
Full Transcript
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Around three billion years ago
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Earth's oceans were packed
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full of dissolved metals
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Metals like iron
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This key that we see here
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is rusty
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and in order to form rust
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we need three ingredients
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The first is iron which is
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what this key is made of
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the second is water
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or water vapor in the air
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and the third crucial ingredient
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is oxygen
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NARRATOR And in Earth's early oceans
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oxygen began to react more and more with iron and other metals
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as cyanobacteria spread across the oceans
00:00:49.833 --> 00:00:53.667
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Movie Summary
Science documentaries about various topics.
