Synthesized answer
The provided passages do not contain enough information to explain the key concepts of Alexander von Humboldt's "Kosmos: Entwurf einer physischen Weltbeschreibung" in my own words. While the title is given [1], there are no descriptions or explanations of the work's core ideas.
Therefore, I cannot provide a summary or define the key concepts based on the given text. To answer this question, passages that detail the content and arguments of "Kosmos" would be necessary.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: Kosmos, Entwurf einer physischen Weltbeschreibung, von Alexander von Humboldt by Alexander von Humboldt