| A | B |
| Ptolemaic System | The is a geocentric system that places the Earth at the center of the universe. |
| Inductive reasoning | _____ is the doctrine that scientists should proceed from the particular to the general by making systematic observations and carefully organized experiments to test a hypotheses of theories; this process will lead to general principles. |
| Nicolaus Copernicus | This scientist believed that the universe was heliocentric, and sun-centered. |
| Rene Descartes | ____ is known as the "father of modern rationalism." |
| Heavenly bodies | Ptolemy said that _____ are embedded in the spheres which rotate around Earth. |
| Isaac Newton | _____ wrote Principia where he defined the three laws of motion that govern planetary bodies, as well as objects on Earth. |
| Rationalism | _____ is a system based on the belief that reason is the chief source of knowledge. |
| Geocentric | A _____ system places the Earth at the center of the universe and the sun, moon, and other planets revolve around it. |
| "I think, therefore I am." | Descartes is known for his famous quote, "____". |
| Gravity | Newton's universal law of gravitation explained that every object in the universe is attracted to every other object by a force called _____. |
| Heliocentric | A _____ system is where the sun stands at the center of the universe and the planets revolved around it in a circular motion. |
| Scientific Method | The _____ is a systematic procedure for collecting and analyzing evidence. |
| Church | The _____ ordered Galileo to abandon his ideas because it threatened their entire conception of the universe. |
| Francis Bacon | ____ used inductive reasoning to learn about nature. |
| Johannes Kepler | This scientist came up with the laws of planetary motion which stated that the planets orbited in an elliptical motion instead of a circular one. |
| Galileo | _____ was the first European to make regular observations of the heavens using a telescope. |