Across
- 3. He developed the first mercury barometer, a tool for measuring atmospheric pressure and predicting weather.
- 7. He was a British physician who introduced a vaccine to prevent smallpox.
- 8. He concluded that certain mathematical laws govern planetary motions.
- 10. The Greek philosopher of the fourth century B.C. that came up with the geocentric theory.
- 12. He developed analytical geometry, which linked algebra and geometry. This provided an important new tool for scientific research.
Down
- 1. His great discovery was that the same force ruled motion of the planets and all matter on earth and in space.
- 2. He published a small book called Starry Messenger in 1610 and then he published Dialogue Concerning the Two Chief World Systems in 1632.
- 4. He formulated a comprehensive heliocentric model of the universe, which placed the Sun, rather than the Earth, at the center.
- 5. A Dutch maker of eyeglasses that invented the first microscope.
- 6. A Danish astronomer who is best known for the astronomical observations which led Kepler to his theories of the Solar system.
- 9. Created a law that explains how the volume, temperature, and pressure of gas affect each other.
- 11. An English statesman and writer who urged scientists to experiment and then draw conclusions, which was called the experimental method.