Q 01/05

At what Fahrenheit reading does water boil at sea level?

A) 250 °F

B) 232 °F

C) 220 °F

D) 212 °F

Answer · why

D) 212 °F

On the same scale water freezes at 32 °F, a 180-degree span versus Celsius's 100.

Q 02/05

The kelvin is one of how many SI base units?

A) Seven

B) Six

C) Five

D) Nine

Answer · why

A) Seven

The unit name is spelled with a lower-case k, and since 2019 it is defined through the Boltzmann constant.

Q 03/05

By what exact offset do the Celsius and Kelvin scales differ?

A) 491.67

B) 459.67

C) 373.15

D) 273.15

Answer · why

D) 273.15

A one-degree Celsius step equals a one-kelvin step; only the zero point moves.

Q 04/05

What was the Celsius scale formerly called?

A) Decigrade

B) Centigrade

C) Octogesimal

D) Metric scale

Answer · why

B) Centigrade

The name came from the 100-degree interval between water's freezing and boiling points.

Q 05/05

What is the officially recognised highest air temperature ever recorded on Earth?

A) 48.9 °C

B) 51.0 °C

C) 54.0 °C

D) 56.7 °C

Answer · why

D) 56.7 °C

Furnace Creek Ranch in Death Valley logged it on 10 July 1913; a higher 1922 Libyan reading was decertified in 2012.