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Evolution of Life loading

Populations of organisms change over time. A process that began on earth 3.5 bya.

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Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
  • Video
    ET is (Probably) Out There - Get Ready

    ET is (Probably) Out There - Get Ready

    by CK-12 //basic
    In this intriguing video, researcher Seth Shostak explains why the discovery of intelligent life outside of our planet very likely. He also forecasts how the discovery of civilizations far more advanced than ours might affect us here on Earth.
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