| Hint | Answer | % Correct |
|---|---|---|
| Vacuum | 1.00 | 100%
|
| Water | 1.33 | 100%
|
| Pyrex Glass | 1.47 | 100%
|
| Plexiglass | 1.49 | 100%
|
| Crown Glass | 1.52 | 100%
|
| Diamond | 2.42 | 100%
|
| Ice | 1.31 | 0%
|
| Ethanol Alcohol | 1.36 | 0%
|
| Fluorite | 1.43 | 0%
|
| Fused Quartz | 1.46 | 0%
|
| Glycerol | 1.47 | 0%
|
| Lucite | 1.50 | 0%
|
| Benzene | 1.50 | 0%
|
| Table Salt | 1.51 | 0%
|
| Crystalline Quartz | 1.54 | 0%
|
| Carbon Disulphide | 1.63 | 0%
|
| Flint Glass | 1.66 | 0%
|
| Ruby | 1.71 | 0%
|
| Sapphire | 1.77 | 0%
|
| Zircon | 1.92 | 0%
|