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Scan the titles, boldfaced words, pictures, figures, and captions
in Section 3. Write two facts you discovered about animals as you
scanned the section.1.2.
Use your book or dictionar y to define cycle. Then give an example
of a cycle.Use your book or dictionary to define each vocabular y term.Principles of Ecology
Section 2.3 Cycling of Matter
18 Principles of Ecology
Main Idea
New
Vocabularycyclebiogeochemical cycledenitrificationmatternitrogen fixationnutrientReview
Vocabulary