| A | B |
|---|
| Isaac Newton | discovered three laws of motion and the law of universal gravitation |
| Galileo | popularized the experimental method of "doing" science |
| gravity | an attractive force between two masses |
| astronomy | a branch of science dealing with the motions and makeup of celestial bodies |
| telescope | a device for looking at distant objects |
| mass | the amount of matter in an object |
| weight | the force of gravity on an object |
| Einstein | discovered General Relativity |
