Across
- 7. who made the heliocentric theory
- 9. a step-by-step method of investigation involving observation and theory to test scientific assumptions
- 10. stated the law of gravity in a simple formula
- 11. the force of attraction between all masses in the universe
- 12. invented the telescope
Down
- 1. a theory that places the sun at the center of the solar system
- 2. a major shift in thinking between 1500 and 1700 about the natural world
- 3. a belief in reason and logic as the primary paths to knowledge
- 4. a measure of amount of matter in an object
- 5. scientists use it to make small objects appear much larger
- 6. an idea or assumption to be tested in an experiment
- 8. a theory that Earth is the center of the universe