| Hint | Prefix |
| The force required to break a hydrogen bond is 4 _newtons. | |
| A litre of water weighs 1 _gram. | |
| The charge on one electron is 160 _coulombs. | |
| The total output of the Sun is 385 _watts. | |
| Light in a vacuum will take 3.34 _seconds to travel one metre. | |
| In 2012 a consumer-level digital camera will take a picture at roughly 10 _pixels. | |
| Earth's atmosphere weighs 5.1 _grams. | |
| The area of a uranium nucleus is 100 square _metres. | |