This lesson plan is part of the DiscoverySchool.com lesson plan library for grades 9-12. It focuses on Galileo's observations and conclusions about Earth's place in the the solar system and how this was a conflict with the Catholic church, as well as the subsequent scientific revolution. Students look at current scientific conflicts to see what it was like for Galileo. It includes objectives, materials, procedures, discussion questions, evaluation ideas, performing extensions, suggested readings, and vocabulary. There are videos available to order which complement this lesson, an audio-enhanced vocabulary list, and links to teaching tools for making custom quizzes, worksheets, puzzles and lesson plans. Educational levels: High school