GED Science Practice

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Prepare for the GED Science Exam with our comprehensive quizzes featuring flashcards and multiple-choice questions. Each question includes hints and explanations to help you grasp essential concepts and succeed.

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What does the term "calorie" measure?

an electrical device used to store electrical charge
unit of heat required to raise the temperature of water
long and slender capillary with a small diameter
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.