GED Science Practice

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What does the term "calorie" measure?

  1. an electrical device used to store electrical charge

  2. unit of heat required to raise the temperature of water

  3. long and slender capillary with a small diameter

  4. branching off from the trachea into the lungs

The correct answer is: unit of heat required to raise the temperature of water

The term "calorie" specifically refers to a unit of heat energy. It is defined as the amount of heat required to raise the temperature of one gram of water by one degree Celsius (at a pressure of one atmosphere). This measurement is crucial in fields such as nutrition and thermodynamics, as it helps quantify the energy content in food and the energy transfer in physical processes. The other options pertain to different scientific concepts: one describes an electrical storage device, another refers to a type of blood vessel (capillary), and the last one is related to the respiratory system anatomy. Each of these options represents a distinct area of study, separating them from the context of caloric measurement.

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