Electricity Flashcards
What are the four main types of energies?
Heat, light, sound and movement.
A TV use what kinds of energies?
Heat, light and sound.
A dishwasher uses what kind of energies?
Heat, sound and movement.
A kettle uses what kind of energies?
Heat and sound
What is an electrical circuit?
An electrical circuit is a system for transferring energy from one place to another.
What is a conductor? Give Example.
A conductor is something that can allow electricity through it. Eg iron
What is an insulator? Give Example.
An insulator is something that does not allow electricity through it. Eg Plastic, Rubber, Ceramic, glass, wood.
What is a poor conductor? Give Example.
A poor conductor is some that can let electricity through it self aka a semiconductor. Eg water.
What is a device?
A device is a man-made objects to do a specific job.
List three objects and say what electrical energy they use.
Bulb = Heat and Light Buzzer = Sound Motor = Movement and Sound
Name 7 items used in making a circuit.
A cell, Battery, Connecting wire, Lamp/Bulb, Switch, Buzzer and a Electric Motor
Describe a cell.
It can be changed into electrical energy, it has two terminals - Positive and negative terminals and tells you how much volts is on the cell.
What is a series circuit?
When the all the circuit things are in a chain like position.
What is a parallel circuit?
A parallel circuit is a circuit that is made in such a way that it has two or more different circuits.
What would you use to put out an electrical fire?
Sand or a chemical fire extinguisher. Not water.
What would you do if someone is being electrocuted?
Don’t touch them as you will get an electric shock. Use an object that does not conduct electricity - wood, rubber or plastic object.
Three tips when using electrical appliances:
- Make sure it is unplugged if filling with water (kettle, iron).
- Do not use if you can see the wires.
- Do not use in the bathroom eg heater near the bath, hairdryer near the sink.
Why do we have insulators?
To protect us from the dangers of electricity.
They stop the electricity from going to other parts of the system where it may cause a fire or other damage or injure a person.
What do electricians do?
They know about electricity and hot to work with it safely.
What are fossil fuels?
The remains of dead plants and animals that store energy from the sun from millions of years ago.
Give some examples of fossil fuels:
Coal, Oil and natural gas.
Where does the energy in fossil fuels come from?
The Sun.
How are fossil fuels formed:
Pressure from above and heat from the earth over millions of years.
How was coal formed. 4 Comments:
- Huge ferns and forest grew and they absorbed the energy from the sun millions of years ago.
- Plants died and formed into layers of rotting material. Overtime pressure from above packed layers together to form Peat.
- Dead sea animals made lignate.
- Sand and mud piled on top, more pressure occured and heat inside the earth turned liginate and peat into coal.
