What is known as the measurable degree of hotness or coldness of anything?

The measurable degree of hotness or coldness of anything is referred to as temperature. Temperature quantifies the kinetic energy of the molecules within a substance, which directly correlates with how hot or cold that substance feels to touch or is measured in scientific terms. This can be represented in various scales such as Celsius, Fahrenheit, or Kelvin, allowing for consistent and universal understanding of thermal conditions.

In contrast, percentage refers to a proportion out of a hundred and does not apply to thermal measurements. Amount simply indicates a quantity without specifying any particular property like heat or coldness. Heat, while related to temperature, specifically refers to the energy transferred between substances or systems due to a temperature difference, but it does not measure the intensity of that energy or the condition of the substances themselves. Thus, temperature is the precise term for what is being described in the question.