energy Flashcards
Q: What are the units of energy?
A: Joules (J) or kilojoules (kJ).
Q: Name some types of energy.
A: Kinetic, heat, sound, light, electrical, potential.
Q: What are the types of potential energy?
A: Gravitational, elastic, chemical, nuclear.
Q: What are the three methods of heat transfer?
A: Conduction, convection, radiation.
Q: What is the difference between energy transfer and energy transformation?
A: Energy transfer is the movement of energy from one place to another. Energy transformation is the change of energy from one form to another.
Q: What does the Law of Conservation of Energy state?
A: Energy cannot be created or destroyed, only transformed.
Q: What is energy efficiency?
A: Energy efficiency = Useful energy output / Total energy input.
Q: What is a Sankey diagram used for?
A: It shows the flow of energy and illustrates energy efficiency.
Q: How can houses be made more energy-efficient?
A: Through insulation, energy-efficient windows, house orientation, roof and wall colors, and shading.
