Final answer:
The coldest recorded temperature on Earth is -89.2°C or 184 K at Vostok, Antarctica, which is significantly colder than the current annual temperature at Vostok of -55.1°C. The units for measuring density include kg/m³, g/cm³, and lb/ft³.
Step-by-step explanation:
The range of observed temperatures refers to the minimum and maximum temperatures that have been recorded historically or are recorded within a certain context. The coldest temperature ever recorded on Earth was -128.6°F at the Vostok Station in Antarctica in 1983. This temperature in degrees Celsius is approximately -89.2°C, and in Kelvins, it would be 184 K. When comparing this to the current annual temperature at Vostok, which is -55.1°C, it is evident that the record low temperature is significantly colder.
Regarding density units, density can be measured in various units depending on the system of measurement and the substances involved. Common units for density include kilograms per cubic meter (kg/m³), grams per cubic centimeter (g/cm³), and pounds per cubic foot (lb/ft³).