Across
- 2. system of thought expounded by Rene Descartes is based on the belief that reason is the chief source of knowledge.
- 4. is one of Newton's three rules of motion; it explains that planetary bodies continue in elliptical orbits around the sun because every object is attracted to other objects by gravity
- 7. is any of the concentric, revolving, spherical transparent shells in which, according to ancient astronomy, the stars, sun, planets, and moon are set.
- 8. theory says knowledge is achieved by observations
- 9. Galileo Galilei invented this to make sure the sun is centered and used it to make other discoveries
- 10. Sun-centered system of the universe in which planets revolve around the sun
Down
- 1. person who studies and tries to explain the world; a scholar or a thinker
- 3. systematic procedure for collecting and analyzing evidence that was crucial to the evolution of science in the modern world
- 5. doctrine that scientists should proceed from the particular to the general by making systematic observations and conducting carefully organized experiments to test hypotheses or theories
- 6. Earth-centered, a system of planetary motion that revolves around the Earth