Energy Transformations
Circuits & Electricity
Light Energy
Energy Transfers
Anything Goes
100
The toy oven uses a light bulb to bake small cakes. What energy transformation is needed for the oven to serve its purpose?
____________ energy --> ____________ energy
ELECTRICAL energy --> THERMAL energy
100
The students in Ms. Hernandez’s class built the circuit below. With the switches in the positions shown, which load(s) will be on?
All loads/light bulbs will be on.
100
Which of the following are facts about reflection? (Select two)
A) Light bounces off a surface
B) Light passes through a medium
C) Shadows are created when light is blocked
D) White and other light colors are easier to see
A) Light bounces off a surface and D) White and other light colors are easier to see
100
Explain one way in which you know energy is being transferred.
One of the following:
You know energy is being transferred when you see movement or motion.
You know energy is being transferred when you hear sound and feel vibrations.
100
Use the image below to describe how water can reflect light.
The water's surface looks/acts like a mirror - you can see the person's reflection on it as well as things around them.
OR
Light bounces off the smooth surface of the water, creating a mirror image.
200
Ms. Del Angel just got a pet turtle. She clamps a battery-powered lamp to the side of a table, points it at the turtle, and turns the lamp light on. What energy transformation is needed for the lamp's bulb to turn on?
__________ energy --> __________ energy --> __________ energy
CHEMICAL energy --> ELECTRICAL energy --> LIGHT energy
200
The biggest difference between conductors and insulators is that… (select TWO)
a)Conductors block the flow of electricity.
b)Insulators allow electricity to flow freely.
c)Insulators block the flow of electricity.
d)Conductors allow electricity to flow freely.
c)Insulators block the flow of electricity.
AND
d)Conductors allow electricity to flow freely.
200
Which of the following are facts about refraction? (Select two)
A) Light bounces off a surface
B) Light passes through a medium
C) Mediums (objects) can look larger, broken, or bent
D) Shadows are created when light is blocked
B) Light passes through a medium and C) Mediums (objects) can look larger, broken, or bent
200
Describe how energy moves when you release one of the spheres in a Newton's cradle using the words TRANSFER and COLLISION.
Example:
When one sphere collides with another, it transfers energy because there is movement.
200
Is the circuit below open/incomplete or closed/complete? Explain how you know.
This is an open/incomplete circuit because the light bulb is not connected using two wires to the (+) and the (-) sides of the battery.
300
The six forms of energy we studied this year are...
Chemical Energy
Mechanical Energy
Electrical Energy
Light Energy
Thermal Energy
Sound Energy
300
If the switch is open, which load/loads will have an electrical current running through it/them? Select all that apply.
Loads 2, 3 and 5 will have an electrical current running through them.
(Loads 1 and 4 will be off because they are not part of a complete circuit.)
300
Fill in the blank.
Object ___ represents absorption because ______________.
Object 2 represents absorption because the light ray is being blocked, light is not passing through, and/or light is going into the cube.
300
Describe how you are able to hear someone playing a guitar using the words TRANSFER, SOUND, and VIBRATION and/or WAVE.
Example:
Sound energy transfers through waves created by vibrations when someone plays a guitar so it reaches your ears.
300
Use the image below to describe how water can REFRACT light.
Light travels through the fish tank with water OR you can see through the fish tank with water.
OR
The man's head looks like it's split in half OR the man's head looks broken OR the man's head looks strange/not normal.
400
When all switches in the circuit below are closed, starting with the battery, what is one energy transformation that occurs?
__________ energy --> __________ energy --> __________ energy
CHEMICAL energy --> ELECTRICAL energy --> LIGHT energy
OR
CHEMICAL energy --> ELECTRICAL energy --> SOUND energy
400
Identify the two complete circuits. Then explain how you know those are the two circuits with electrical energy flowing through them.
Circuit 1 and Circuit 2 because...
1) They are the only two circuits where the wires are correctly connected to the battery.
AND/OR
2) They are the only two circuits that have no holes/gaps/breaks or insulators along any of the paths.
400
Identify TWO ways in which a microscope refracts light.
1) Light passes through the lens, allowing you to see the substance on the stage using the eyepiece and 2) a microscope's lens magnifies (makes larger) substances.
400
Describe how energy is moving using the words TRANSFER, PARTICLES, and UP and DOWN.
Example:
Energy is transferred from the water to the surfer by water particles moving up and down.
400
Describe the energy transformation that needs to occur to make the circular saw useful.
________ energy --> ________ energy because...
ELECTRICAL energy to MECHANICAL energy because the circular saw needs to be plugged into an outlet for electricity (electrical) to run through its wires. Then the saw blade moves (mechanical) so you can cut wood.
500
Describe TWO COMPLETE energy transformations that happen in the circuit.
Two of the following:
Chemical --> Electrical --> Light
Chemical --> Electrical --> Sound
Chemical --> Electrical --> Mechanical
500
Examine the circuit. What procedures, or steps, are needed so that only the blue light bulb and white light bulb are on?
1) Close SWITCH 2
2) Leave SWITCH 1 and SWITCH 3 open
500
State TWO facts about light you can identify using the image below.
TWO of the following:
1) Light travels in a straight line
2) Light can be absorbed by some objects, like a ball, creating a shadow
3) Light can be blocked by some objects, like a ball, creating a shadow
4) Light reflects off light-colored objects, like the light gray ball, allowing us to see it better
500
What three forms of energy transfers did we study in class? Hints - movement, water, and sound
Transfer through collision
Transfer through water particles
Transfer through vibrations and sound waves
500
A girl is studying how light reacts to different mediums. State TWO reasons why this is NOT an example of refraction.
ONE of the following:
1) Light does not pass through the girl.
2) The girls looks normal - not larger, bent, broken, etc.
3) Light is reflecting off the girl's clothes.
4) A shadow is being created.