P1.1/1.2 - Energy Stores Flashcards
1
Q
Chemical energy store
A
- Energy that is transferred during a chemical reaction
- e.g foods, fuels
2
Q
Kinetic energy store
A
- describes the energy of a moving object has due to it movement
- e.g bouncing ball
3
Q
Gravitational potential energy
A
- describes the energy an object has due to its height
- e.g a bungee jumper
4
Q
Elastic potential energy
A
- describes energy stored in an object due to its ability to be stretched/squashed
- e.g a spring, sling shot
5
Q
Thermal energy store
A
- describes energy a substance has due to its temperature
- boiling water
6
Q
Name the energy transfers
A
- heating
- sound/light waves
- electric current
- physical force
7
Q
Electric current
A
Transferring energy to an appliance
8
Q
Physical force
A
Moving an object (stretching)
9
Q
Explain the changes in energy stores of a torch
A
- the battery contains chemical energy
- this is transferred by an electric current
- to the bulb where it emits light energy
- it release heat energy which is dissipated
10
Q
Describe the energy changes in a kettle
A
- electric current transfers energy into the kettles heating element
- this transfers thermal energy to the store of the water
11
Q
The law of conservation of energy
A
- energy cannot be created/ destroyed
- it can be transferred from one store to another
12
Q
Closed system
A
-there is not net change to the energy in the system
System is a group of objects
