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100
What is an electric current?
A flow of electric charges
100
When light bounces off it is what?
Reflecting
100
What are 3 ways that energy can be transferred without moving objects?
1. sound 2. light 3. heat
100
FREE POINTS!!!
:)
100
FREE POINTS!
:)
200
What is true of energy carried by sound, light, and heat?
Energy is conserved
200
When light is taken in it is what?
absorbed
200
Parts that work together to form a complete path, allowing electricity to flow is ______________.
a circuit
200
What is a device that uses an electric current to produce motion?
a motor
200
This allows an electric current to flow through it freely, what is it?
a conductor
300
All sound starts with a what?
A vibration
300
When an object loses energy as heat, light, or sound, the energy is not destroyed but is what?
Transferred
300
What happens when two objects collide?
Energy is transferred from one object to the other.
300
In a speaker, an electric current moves a cone-shaped part, which does what? (you may use notes)
transfers energy to the air
300
This does not allow an electric current to flow through it, what is it?
insulator
400
To transfer energy carried by light to an electric current you need a what?
a solar cell
400
What happens when you kick a ball? (energy related)
The energy from your foot is transferred to the ball.
400
When two objects of the same weight traveling at different speeds collide head on, both objects do what?
bounce backward and travel at their original speed
400
Name one thing in the classroom that uses electricity
..
400
Stored energy or energy that an object has because of its position is what?
potential energy
500
Energy is always what?
conserved
500
Objects, as well as air, transfer energy when they what?
collide
500
When someone is holding a hot cup of coffee, why is their hands becoming hot?
The heat from the coffee is transferring from the cup to her hands.
500
When you pluck a guitar string where does the energy transfer to?
the string
500
Draw a series circuit on your own paper.
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