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In 2006, the International Astronomical Union defined the terms "planet" and "dwarf planet." The IAU's decision created an opportunity for students to understand the solar system better by considering the definitions of planet, dwarf planet and asteroid. New discoveries in the solar system require a change in the language used to discuss it. The activity uses direct vocabulary instruction to help students learn these new definitions.
Detailed steps to instruction and student activity sheets allows educator to guide students through identification (images provided) , description and comparison of planets, dwarf planets and asteroids. Excellent MS source. Includes links for further extension.
Alyce D (Peyton, CO)