Across
- 3. accredited for the theory of atomism and rational debates
- 6. discovered the three laws of planetary motion and that the planets move in elliptical orbits around the sun
- 7. using his telescope, he recorded the moon's phases, discovered four moons of Jupiter, viewed sun spots, and confirmed the heliocentric model of the solar system through observations of Venus's phases
- 10. one of the first natural philosophers to develop natural explanations to Earthly phenomena, as opposed to mythical or divine ones
- 11. proposed the heliocentric model of the solar system, that Earth revolves around its own axis, and that the speed of each planet's orbit depends on its size and distance from the sun
- 12. student of Plato, founder of the Lyceum, and developer of a systematic approach to observation and experimentation
Down
- 1. famous for saying, "I think, therefore, I am."
- 2. proposed the geocentric theory and believed that planets moved in epicycles around the Earth
- 4. proposed the four classical elements--earth, air, fire, and water--as well as two forces, love and strife
- 5. famous for saying, "The unexamined life is not worth living," as well as his method of teaching based on questioning, debating, and examining
- 8. developed a mathematical theorem that demonstrated the relationship between sides of a right triangle
- 9. student of Socrates, founder of the Academy, and author of "The Allegory of the Cave"