How does a change of 1 degree Celsius relate to Kelvin?

A change of 1 degree Celsius is directly equivalent to a change of 1 Kelvin because both scales represent temperature changes with the same incremental size. The Celsius scale and the Kelvin scale have a consistent linear relationship; they differ only in their starting points. The freezing point of water is 0 degrees Celsius, which corresponds to 273.15 Kelvin, and the boiling point is 100 degrees Celsius, equivalent to 373.15 Kelvin.

Therefore, when measuring temperature changes (as opposed to absolute temperatures), an increase of 1 degree Celsius results in the same change in the Kelvin scale. This is why a temperature change of 1 degree Celsius corresponds to a change of 1 Kelvin, demonstrating the direct correlation between these two temperature scales.