Science Term 4 Test Electricity Flashcards
Define current electricity
- Electricity is a form of energy that involves the movement of electrons from one atom to another
- As electrons are negatively charged, they move towards positively charged areas, creating an electrical current.
Define Insulator
A material which does not allow electrons to pass along it
Examples of insulator
Rubber, wood, and styrofoam
Define conductor
A material which allows electrons to pass
Example of conductor
Copper , sea water, gold
Compare current electricity with static electricity
Current:
* Moving
* Current electricity is where electrons are flowing through a conductor in a closed circuit.
Static:
* Not moving
* Static electricity is where electrons collects on the surface of an object (Usually an insulator)
If I rub a ballon on my head, the balloon becomes negatively charged so my hair strand on the end is also negatively charged
T/F
True
Define Electrical energy
- Movement of electrons
- Used to power lights, computers, and other devices
Define kinetic energy
Any object that is moving has kinetic energy
Define sound energy
- Sound energy is given off as sound waves when something vibrates - we can hear because our ears can detect the energy of the sound waves
- Music, beatboxing, speaking
Define light energy
- Light energy = light waves
- We can see because our eyes can detect light energy
Define gravitational potential energy
Found in objects due to their height above ground
Chemical potential energy
Energy stored in the bonds of atoms
Elastic potential energy
Energy stored in an object when it is squashed or stretched
Nuclear energy
Energy released when you split atoms
