| A | B |
|---|
| geocentric | earth centered system |
| heliocentric | sun centered system |
| Galileo Galilei | Italian astronomer, teacher and inventor |
| telescope | make things farway appear closer |
| thermometer | used to measure temperture |
| Isaac Newton | English scientist who studied gravity |
| Scientific Method | A way of questioning and studying nature |
| gravity | force that pulls things toward Earth |
| Silk Road | trade route between Asia and Europe |
| caravel | a new type of European sailing vessal |
| Christopher Colombus | in 1492 sailed to the western hemisphere |
| Vasco de Gama | 1497 sailed to India |
| Ferdinand Magellan | 1519 sailed around the world |
