| A | B |
|---|
| scientific method | an approach used by scientists to collect and accurately measure data |
| gravity | force that keeps planets in their orbits around the sun |
| Tycho Brahe | made 20 years of observations of the heavens that Kepler and Copernicus were able to use in their calculations |
| Johannes Kepler | proved mathematically that planets moved in elliptical orbits around the sun |
| Francis Bacon | helped develop scientific method discarded bible and Aristotle for observation and experimentation |
| Rene Descartes | helped develop scientific method emphasized human reasoning as the best road to understanding |
| Robert Boyle | a chemist who distinguished various elements and compounds |
| Heliocentric | sun-centered model of the universe |
| Hypothesis | possible explanation or educated guess |
| Galileo Galilei | made observations of Jupiter with a telescope and concluded that Copernicus was correct about the movement of the planets around the sun |
| Isaac Newton | proposed the law of gravity |
| Andreas Vesalius | published the first accurate and detailed study of human anatomy |
| Ambroise Pare | French physician who developed a new and more effective ointment to prevent infection and a technique for closing wounds with stitches |
| Anton von Leeuwenhoeck | Dutch inventor who perfected the microscope becoming the first person to see cells and microorganisms |
| William Harvey | English scholar who was first to successfully describe the circulation of blood in humans |
