AQA GCSE Energy stores and Systems
A system is an object, or group of objects.
Closed System
Energy can enter or leave the system
Particles or matter cannot enter or leave the system
Open System
In an open system both energy and matter can enter and leave the system.
Isolated System
An isolated system is where neither energy or matter can enter or leave.
The system here is insulated.
Energy Stores
Energy is the ability to do work
Energy has units of Joules (J)
Energy can exist in different energy stores.
Energy can be transferred from one energy store to another.
There are 8 energy stores in total
| Name Of Energy Store | Explanation Of Energy Store |
|---|---|
| Chemical | Energy stored in the chemical bonds between atoms. Found in food, fuels and batteries |
| Gravitational | Energy stored in an object at height Greater the mass, height or gravitational field strength the greater the gravitational potential energy |
| Thermal | Energy stored in an object that has a temperature greater than absolute zero Absolute zero is the lowest possible temperature Also known as internal energy |
| Elastic | Energy stored in an object that is stretched or squashed |
| Kinetic | Energy stored in a moving object Greater the mass or velocity, greater the kinetic energy |
| Magnetic | Energy stored by two magnetic materials attracting or repelling |
| Nuclear | Energy stored in the nucleus of an atom |
| Electrostatic | Energy stored by two electrically charged objects attracting or repelling. |
There are FOUR different ways that energy can be transferred:
Practice Questions: (answers are found below the questions, using a link.)
1. State the name of the energy store for a car tyre rolling along a flat road.
2. State the name of the two energy stores that would be present in a hot meal.
3. A battery operated model car is moving along a track, state the way that the energy is transferred.
4. A person is sun bathing on a beach, receiving Infrared from the Sun. State the way that the energy is transferred from the Sun, to the person.
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