Its a movable section of a circuit that opens or closes the circuit
200
What changes electrical energy into mechanical kinetic energy?
electric motor
300
What is an electric current?
a continuous flow of electric charge through a pathway
300
What is a positive and negative of using wind energy?
Positive- renewable
Negative- windmills change habitats, cost money to put up and maintain
300
Name two good conductors and two good insulators
C- Copper, lead, steel, (metals), water
I- plastic, wood, air
300
True or false: If a circuit is open it will work
False, it will not. It only works in a CLOSED circuit
300
Why do we need step up and step down transformers?
They slowly increase and decrease the amount of energy needed to power our homes. Step up increases it so it is able to travel long distances to our houses. Step down lowers it so there isn't too much electricity entering our houses.
400
What type of energy is stored in a battery?
Chemical energy
400
What is a positive and negative of using hydroelectric power?
Positive- renewable
Negative- changes the environment
400
How do electrons behave or act in a circuit?
they move through conductors
400
Why should things be wired in a parallel circuit?
Each item get the full voltage from the power source and there are different pathways for the electricity to travel so if one pathway opens, the others still work
400
What is a way electricity is transformed into another type of energy?
electrical energy to radiant or light energy (light bulbs)
electrical energy to thermal energy (hair dryer, toaster, heater)
electrical energy to mechanical energy (saw, drill, pencil sharpener)
500
What is a positive and negative of using batteries to make cars run.
Positive- not using fossil fuels, rechargable (to a certain extent)
Negative- when done it goes in a landfill, fossil fuels used to make them
500
Why don't we use fuel cells in everyday life?
We need to find a way to supply the hydrogen needed.
500
If I have a set of lights, and one light bulb breaks so they all go out, what type of circuit is it?
Series
500
Why are circuit breakers and fuses important?
They don't allow things to get too hot and cause fires. They stop electricity from continuing to flow by creating an open circuit