Across
- 3. He discovered the force of gravity.
- 9. He belived in irregular, elliptical planet orbits around the Sun.
- 11. Every object in the universe is attracted to every other object by a force.
- 12. He came up with the scientific method to study nature by using inductive reasoning.
- 13. He believed that everything is composed of a material substance (mass).
- 14. The Sun is the center of the universe.
Down
- 1. Proceeding from the particular to the general.
- 2. He is the father of modern rationalism.
- 4. The shape of our planet.
- 5. The belief that reason is the chief source of knowledge.
- 6. The Earth is the center of the universe.
- 7. He believed in a geocentirc model of the universe.
- 8. He believed in a heliocentric model of the universe.
- 10. A systematic procedure for collecting and analyzing evidence.