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Energy Level

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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.
  • Real World Application
    How Exciting!

    How Exciting!

    by CK-12 //basic

    Learn how fireflies use chemical reactions to produce light by chemoluminescence.

  • Real World Application
    In the Clouds

    In the Clouds

    by CK-12 //basic

    Learn about the quantum model of the atom and how it helps explain virtually every chemical change in the universe.

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