WHAT IS ELECTRICITY?
what is electricity?
A form of energy used to power devices.
What is an insulator?
An insulator is an object that does not allow electricity to travel through it.
What is a proton?
A proton is a positively charged part of an atom.
How is hydro electric power produced?
The power of water is used to turn the wheels of a turbine that is connected to a generator that transforms the kinetic energy of from the turbine in electrical energy.
When you open a circuit....
Electrons stop flowing, devices turn off
Describe how electricity is used?
Provides power on Earth and in Space
What is a conductor?
A conductor is an object that allows electricity to pass through it.
What is an electron?
An electron is a negatively charged part of an atom.
How are fossil fuels like natural gas, oil and coal used to generate electricity?
The fossils fuels are burned to heat water which boils and creates steam. The steam rises and turns turbines which generate electricity.
When you close a circuit....
Electrons can flow, devices turn on
What is the job of a battery?
To provide energy
Why is it important that wires in your wall are covered in plastic/rubber?
They prevent you from making direct contact with the electricity in the wire.
If an atom has the same number of electrons and protons, what type of electrical charge does it have?
a neutral charge
Describe two problems with burning fossil fuels to generate electricity.
air pollution, acid rain, carbon dioxide from the burning process contributes to the greenhouse effect
A circuit includes:
An energy source ( Battery)
A conductor (wire)
A load (light bulb)
Ammeter
Name three objects that conduct electricity.
penny, quarter, wire, pop can, spoon, fork, knife,
When objects have different charges, do they attract or repel each other?
Objects with opposite charges attract one another and objects with the same charge repel each other
In terms of electricity, what does AC stand for?
Alternating current
Charge is a measure of electrons and uses the unit...
Coulombs
Electric Power is typically measured in what unit?
Watts
Name three insulators.
wood, rubber, plastics,
Why does your hair stand on end when you rub a balloon it it?
The atoms in your have lost electrons to the balloon through the rubbing and now your strands of hair have positive charges so they repel each other.
In terms of electricity, what does DC stand for?
Direct current
Electric charge is represented by the symbol.....
(Q)