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並前往https://www.alaska.edu/k12reach/pdf-lessons/py2-pdfs/4-5/12_reach_45_howdoweatheringandersoionaffectrocks.pdf

HOW DO WEATHERING AND EROSION AFFECT ROCKS?

Lesson 12 — Grades 4-5. INSTRUCTIONS. 3. Activity Preparation. 1. Take a walk around the village and make note of any areas of weathered rock or erosion.

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