WHAT IS ELECTRICITY?
CONDUCTORS AND INSULATORS
STATIC ELECTRICITY
WHERE DOES ELECTRICITY COME FROM?
RENEWABLE ENERGY & CIRCUITS
100
What is electricity?
a form ofenergy that is used to power devices
100
What is an insulator?
An insulator is an object that does not allow electricity to travel through it.
100
The first law of thermodynamics.
Energy cannot be created or destroyed.
100
How is hydro electric power produced?
The gravitational energy 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.
100
Name 4 parts of a circuit.
Wire, Resistor, Switch, Battery
200
Describe the engery transformations that occur in a television.
electrical energy is tranformed into light energy so that you can see the picture, sound energy so that you can hear the program and heat
200
What is a conductor?
A conductor is an object that allows electricity to pass through it.
200
What is an electron?
An electron is a negatively charged part of an atom.
200
How is nuclear energy produced?
Uranium atoms are split in a reactor and this creates a tremendous amount of heat that is used to boil water in large tanks. The steam created from the boiling water rises and turns turbines to generate electricity.
200
Name two problems associated with using wind turbines to generate electricity.
The wind turbines take up a lot of space, they are expensive, they are not pretty to look at, birds get caught and killed in them
300
What is the job of a car battery?
the battery stores power and provides the spark that is used to ignite the gas in the engine
300
Why is it important that wires in your wall are covered in plastic?
The plastic is an insulator that prevents you from making direct contact with the electricity in the wire.
300
If an atom has the same number of electrons and protons, what type of electrical charge does it have?
a neutral charge
300
Name three ways to generate renewable electrical energy.
solar power, wind power, water power
300
What is the main problem with using solar power to generate electricity?
The sun does not shine all day and thus, power must be stored in batteries when the sun is not shining. Also, solar panels are expensive.
400
Describe the route electricity travels from Niagara Falls to your house.
Water turns the turbine at the power plant creating electricity. Then the electricity travels through high power transmission lines to a small power station, goes through a transformer and then trvales through power lines to your house.
400
Name three objects that conduct electricity.
penny, quater, wire, popcan, spoon, fork, knife
400
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.
400
How are fossil fules 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.
400
Name one advantage of both a parallel AND a series circuit.
Parallel circuits have low total resistance due to multiple pathways. Also, components are separated so if one stops functioning, the other resistors still function.
Series circuits are cost effective, use less wire.
500
Why does a light go one when you flip a light switch to the on position?
When the switch is in the on position, there is no gap in the circuit so that the electricity can travel in a complete circuit. When the switch is in the off position, there is a gap in the circuit that prevents the electricity from travelling in a complete circuit.
500
Name three insulators.
wood, rubber, most plastics,
500
Why does your hair stand on end when you rub a ballon it it?
The atoms in your have lost electrons to the ballon through the rubbing and now your strands of hair have positive charges so they repel each other.
500
Name an example of chemical energy transforming to machanical energy.
Gas -> Car OR
Eating Apple -> Riding Bike
500
You close switch 1 and switch 2. However, lamp 2 does not turn on. What might cause this?
- CANNOT be battery
- Switch 2 is broken
- Wire between TP2-TP3 is broken
- Wire between TP5-TP6 is broken