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Energy Assesment

QuestionAnswer
What is the definition of energy? Energy is the ability to do work or cause change.
What law states that energy cannot be created or destroyed? The Law of Conservation of Energy.
What are the two main types of energy? Potential energy and kinetic energy.
What is potential energy? Stored energy that has the potential to do work.
What is kinetic energy? Energy of motion – anything that is moving has kinetic energy.
Name the five types of stored (potential) energy. Gravitational, elastic, chemical, nuclear, magnetic.
What is gravitational potential energy? Energy stored in an object due to its height above the ground.
What is elastic potential energy? Energy stored when an object is stretched or compressed.
What is chemical potential energy? Energy stored in chemical bonds, like in food or fuel.
What factors affect gravitational potential energy? The object’s mass and height.
What factors affect kinetic energy? The object’s mass and speed.
Give an example of energy transformation. A lamp transforms electrical energy into light and heat energy.
What is energy transfer? When energy moves from one object to another.
What is a Sankey diagram used for? To show how input energy is split into useful and wasted energy.
In a Sankey diagram, what does the arrow width represent? The amount of energy.
What is useful energy? The energy that is wanted or used for a purpose.
What is wasted energy? Energy that is not useful and is lost to the surroundings, usually as heat or sound.
Give one example of kinetic energy. A moving car or running person.
What type of energy is stored in a battery? Chemical potential energy.
What is conduction? Transfer of heat through direct contact between particles in solids.
What is convection? Transfer of heat by movement of fluids (liquids or gases) where warm particles rise and cool particles sink.
What is radiation? Transfer of heat through electromagnetic waves, without needing particles.
Which heat transfer method allows the Sun’s heat to reach Earth? Radiation.
What type of energy transformation happens when you stretch and release a rubber band? Elastic potential energy → kinetic energy.
Q: What type of potential energy does a rock on top of a cliff have? Gravitational potential energy.
Created by: Dasjose26
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