Which of the following best describes how the Kelvin temperature scale differs from the Fahrenheit and Celsius scales?

• A. The Kelvin scale is based on the boiling point of water, while Fahrenheit and Celsius are not.
• B. The Kelvin scale starts at absolute zero, whereas Fahrenheit and Celsius have arbitrary zero points.
• C. The Kelvin scale uses degrees that are twice as large as those in the Celsius scale.
• D. The Kelvin scale is only used for measuring temperatures below freezing.

Answer: (B)

Verified step by step guidance

1. Understand that temperature scales differ in their zero points and the size of their units.
2. Recall that the Celsius scale sets 0°C at the freezing point of water and 100°C at the boiling point of water under standard conditions.
3. Recall that the Fahrenheit scale sets 32°F at the freezing point of water and 212°F at the boiling point of water, with arbitrary zero points based on historical choices.
4. Recognize that the Kelvin scale is an absolute temperature scale starting at absolute zero, which is the theoretical point where all molecular motion stops (0 K).
5. Note that the Kelvin scale uses the same size degree increments as the Celsius scale but shifts the zero point to absolute zero, unlike Fahrenheit and Celsius which have arbitrary zero points.