BasicStudents 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.
AdvancedStudents matched to this level are ready for material that requires superior performance and mastery.
Leon Teisserenc de Bort used unmanned balloons carrying instruments to discover the troposphere and the stratosphere. He was the first to recognize the different temperature structure of the two layers.
This indicates how strong in your memory this concept is