Science: Energy Flashcards
(16 cards)
What is energy?
Energy is the ability to do work.
What is the unit used for energy?
The unit used for energy is Joule (J).
What is kinetic energy?
Kinetic energy is the energy that a body has because it is moving.
Example: surfer on a wave.
What is potential energy?
Potential energy is the energy something has because of its position or shape; it’s like stored energy waiting to be used.
Example: a spring.
What is sound energy?
Sound energy is energy that is produced by a vibration.
Example: a guitar string.
What is heat energy?
Heat energy is energy that travels between a hot object and a cool object.
Example: a thermometer.
What is chemical energy?
Chemical energy is energy that is stored in batteries or food.
What is electrical energy?
Electrical energy is energy that comes from the flow of electric charge.
Example: a light bulb.
What is solar energy?
Solar energy is energy that comes from the sun.
What is nuclear energy?
Nuclear energy is energy produced from nuclear reactions.
Example: nuclear fusion.
What is the principle of conservation of energy?
The principle of conservation of energy states that energy is neither created nor destroyed but can be converted from one form to another.
What is energy dissipation?
Energy dissipation occurs when useful forms of energy are converted to forms that are not useful, resulting in a waste of useful energy.
What is non-renewable energy?
Non-renewable energy refers to resources that will eventually run out.
Example: coal, oil, peat, nuclear.
What are fossil fuels?
Fossil fuels are fuels made from the remains of plants and animals that were compressed over time.
What is renewable energy?
Renewable energy refers to resources that will not run out.
Example: trees, wind, solar, hydro.
What are Sankey diagrams?
Sankey diagrams are named after H R Sankey, an engineer who used them in 1898 to describe the energy efficiency of a steam engine. In a Sankey diagram, the width of each arrow represents the proportion of energy named.
