CP3 Flashcards
Atomic energy
A name used to describe enemy when it is stored inside atoms.
Chemical energy
A name used to describe energy when it is stored in chemical substances.
Elastic potential energy
A name used to describe energy when it is stored in stretched or squashed things that can change back to their original shapes.
Gravitational potential energy
A name used to describe objects when it is stored in objects in high places that can fall down.
Joule
A unit for measuring energy.
Kinetic energy
A name used to describe energy when it is stored in moving things.
Law of conservation of energy
The idea that energy can never be created or destroyed, only transferred from one store to another.
Stanley diagram
A diagram showing energy transfers, where the width of each arrow is proportional to the amount of energy it represents.
System
A set of things being studied (eg. a kettle, the water in it and its surroundings is a simple system).
Thermal energy
A name used to describe energy when it is stored in hot objects. The hotter something is, the more thermal energy it has.
Dissipated
Spread out.
Efficiency
A way of saying how much energy something wastes. A more efficient machine wastes less energy.
Lubrication
To reduce friction by putting a substance between two surfaces.
Absorb
To soak up or to take in.
Conduction
The way energy is transferred through solids by heating. Vibrations are passed on from particle to particle.
Convection
The movement of particles in a fluid (gas or liquid) depending on their temperature. Hotter, less dense regions rise, and cooler, denser regions sink.
Emit
To give out.
Fluid
A liquid or gas.
Thermal conductivity
A measure of how easily energy can pass through a material by heating. A material with a low conductivity is a good insulating material.
Insulation
A material that does not allow something, e.g. heat or electricity to pass through it.
Radiation
A way of transferring energy by heating.
Thermal insulator
A material that does not allow energy to be transferred through it easily by heating.
Climate change
Changes that will happen to the weather as a result of global warming which is caused by the increased amount of carbon dioxide in the atmosphere.
Fossil fuel
A fuel formed from the dead remains of organisms over millions of years.
Non-renewable
Any energy resource that will run out because we cannot easily renew our supplies of it.
Nuclear fuel
A radioactive metal such as uranium. Nuclear fuels are used in nuclear power stations to generate electricity.
Renewable energy
An energy resource that will never run out.
Uranium
A radioactive metal that can be used as a nuclear fuel.
Biofuel
A fuel made from plants or animals waste.
Hydroelectricity
Electricity generated by moving water turning turbines and generators.
Solar cell
A flat plate that uses energy transferred by the light to produce electricity.
Solar energy
Energy from the sun.
Tidal power
Generating electricity using the movement of the tides.
Wind turbine
A kind of windmill that generates electricity using energy transferred by the wind.
