Which temperature scales have equal sized degrees?

• A. Fahrenheit and Celsius
• B. Celsius and Kelvin
• C. Celsius and Rankine
• D. Kelvin and Fahrenheit

Answer: (B)

Verified step by step guidance

1. Understand that the size of a degree on a temperature scale refers to the magnitude of temperature change represented by one unit increment on that scale.
2. Recall that the Celsius and Kelvin scales have the same degree size because they differ only by a constant offset (0 °C = 273.15 K), meaning a change of 1 °C is equal to a change of 1 K.
3. Recognize that the Fahrenheit scale has a different degree size compared to Celsius and Kelvin; specifically, 1 °F is smaller than 1 °C or 1 K.
4. Note that the Rankine scale is based on Fahrenheit degrees but starts at absolute zero, so its degree size matches Fahrenheit, not Celsius or Kelvin.
5. Conclude that the temperature scales with equal sized degrees are Celsius and Kelvin, as they share the same incremental unit size despite different zero points.