Curated OER
Prehistoric Planet: Rock Layers: Timeline of Life on Earth
Geological eras showing the fossils found in each rock layer.
Curated OER
Science Kids: Science Images: Ozone Molecule
This diagram shows a 3D computer generated image of the triatomic molecule known as ozone. Ozone is an allotrope that contains three oxygen atoms. The ozone layer found in the upper atmosphere helps protect the Earth against potentially...
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