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APES Unit 4 Review: Master Earth Systems and Resources for the 2026 Exam

"AP Environmental Science Unit 4, Earth Systems and Resources, focuses on the geological, hydrological, and atmospheric foundations that shape global ecosystems. Excelling in this unit requires a firm grasp of plate tectonics, soil formation chemistry, atmospheric circulation cells, and watershed dynamics, which frequently appear in both multiple-choice and free-response exam sections. Understanding AP Environmental Science (APES) Unit 4 is essential for mastering the abiotic factors that drive environmental science. This comprehensive review breaks down the core concepts, major geological and meteorological processes, critical vocabulary, and..."

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