| Hint | Answer |
|---|
| The average of the squared differences from the mean | |
| All the plant life in a particular region or period or the ground cover they provide | |
| Measure of the combining power of an element with other atoms | |
| A space entirely devoid of matter | |
| Point in a geometrical solid common to three or more sides | |
| Wisps of precipitation falling from a cloud but evaporating before reaching the ground | |
| Measure of the fluidity of a substance | |
| Quantity that can have any one of a set of values or a symbol that represents it | |
| Brightest star in the constellation Lyra and the fifth brightest star in the night sky | |
| Substance in the gas phase at a temperature lower than its critical point | |
| Planet proposed to exist in an orbit between Mercury and the Sun in the 19th century | |
| Substance required in trace amounts in the diet to maintain normal metabolic functions | |
| Portion of the electromagnetic spectrum that can be detected by the human eye | |
| Italian physicist who published his invention of the electric battery in March 1800 | |
| One of the largest asteroids in the solar system, discovered on 29 March 1807 | |
| Transformation of a substance into a glass | |
| Quantity of three-dimensional space enclosed within a container | |
| Pipe-like gap in the ground allowing volcanic material to pass through to the surface | |
| Elongated depression of the Earth's surface often between ranges of hills or mountains | |
| Small blood vessels that merge with the veins and return blood to the heart | |
