Mechanics Defining Energy: Forms of energy, conversions, and measuring by Anthony Carpi, Ph.D., Zachary Hartman, Ph.D. Reading Quiz Teach with this Which of the following did the Greeks believe composed all matter? earth, air, fire, heart solids, liquids, gases earth, air, water, fire atoms Which of the Greek philosophers was the most important champion of the theory of matter from Question 1? Aristotle Heraclitus Plato Hippocrates How do we define energy? The life-force moving through objects. The ability to perform work. The ability to turn on a light. The ability to cook food. Which of these is not one of the main forms of energy? mechanical electrical nuclear psychic Which of the following statements is correct? Potential energy can be converted to kinetic energy. Potential energy of an object rises as you lift it higher from the ground. Potential energy does not apply only to mechanical energy; it can be found in electrical, chemical, and other forms, as well. All of the choices are true. Which of the following statements about energy is incorrect? Energy cannot be destroyed or created; it can only change forms. Mechanical energy cannot be converted into electrical energy. The chemical energy stored in objects can be used to drive machines. Work is performed by expending energy What was the main contribution of James Joule to our understanding of energy? He gave us the energy unit Joule, which he named after himself. He built the first electric generator, showing the world that energy can change forms. He was the first to carefully prove that mechanical energy can be converted to thermal energy, demonstrating they were not caused by different essences. He was the first to show that microorganisms in beer brewing were responsible for the alcohol content. Score Quiz