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- 1. Multiple Choice
For an electrically charged object to repel another object, what must happen?
The objects must touch.
The objects must have opposite charges.
The objects must have similar charges.
The objects must be very light.
- 2. Multiple Choice
The table provided describes four different scenarios involving charged and uncharged objects. In how many scenarios will the two objects be attracted?
1
2
3
4
- 3. Multiple Choice
First, an electrically charged object is brought near an uncharged object. Then, the electrically charged object is brought near another electrically charged object. In which of these situations would it be reasonable to expect the object to be either attracted or repelled?
Not in either situation
Only in the first situation
Only in the second situation
In both situations
- 4. Multiple Choice
A balloon with an electrical charge is hung from the ceiling on a string. Another balloon is brought near it. An image is provided. What will happen to the balloon on the string when the balloons are brought closer together?
It will move away if the charges are the same.
It will remain still if the charges are opposite.
It will move away if the charges are opposite.
It move upward if the charges are the same.
- 5. Multiple Choice
Electrically charged objects push or pull on other electrically charged objects. Two balls with varying charges are placed close to each other. In which of the following scenarios will the two balls move away from each other?
- 6. Multiple Choice
The charge of an object depends on the relative numbers of electrons and protons. For objects to attract each other, what must be true of them?
The objects must touch.
The objects must have opposite charges.
The objects must be very light.
The objects must be electrically neutral.
- 7. Multiple Choice
William rubbed a balloon across a square of carpet to give it an electric charge. As William brings the balloon near the pieces of paper, which of the following effects is most likely?
The paper will be attracted to the balloon if the paper and balloon have the same charge.
The balloon will lose its charge to the paper, causing them to become very hot.
The balloon and paper will repel each other if the charges are different.
The paper will be attracted to the balloon if they have opposite charges.
- 8. Multiple Choice
A positively charged object is sitting on the floor. An image is provided. Which of the following will most likelyoccur when a negatively charged object is brought near this positively charged object?
The objects will attract each other.
The objects will lose their charges.
The positively charged object will be repelled.
The positively charged object will move upward.
- 9. Multiple Choice
Electrically charged objects can attract and repel. The table provided describes four different scenarios involving charged and uncharged objects. In how many scenarios will the two objects be repelled?
1
2
3
4
- 10. Multiple Choice
Lily rubbed a balloon across her wool sweater. As the balloon is brought near her hair, which of the following effects is most likely?
Her hair and the balloon will repel each other if neither has any charge.
Her hair will be attracted to the balloon if they have opposite charges.
Her hair will be attracted to the balloon if they have the same charge.
The balloon will lose its charge to her hair, causing them to become very hot.
- 11. Multiple Choice
The fan illustrated here plugs into the wall and blows air to make a room cool. Which of the following best explains how it works?
It reduces heat by producing sound energy.
It gets chemical energy from gases in the air.
It transform electrical energy into the energy of motion.
It spins, sending heat and light energy through its wires.
- 12. Multiple Choice
Mayas teacher asked all the students to take a picture of electrical energy being transformed into light energy. Which picture will correctly meet the requirements of this assignment?
- 13. Multiple Choice
Which of the following energy transformations occur when Suzy brushes her teeth with an electric toothbrush?
Chemical to light
Electrical to chemical
Electrical to motion
Chemical to electrical
- 14. Multiple Choice
Scott has spent the day at school. During the day, Scott uses several devices that use electricity. Which device is designed specifically to convert electrical energy to heat energy?
Toaster
Alarm clock
Bicycle
Calculator
- 15. Multiple Choice
Kenny is observing a device being used. He records the following energy transformations:
Chemical to Electrical to Light
Which device is Kenny most likely observing?
A triple beam balance measuring an objects mass
A pencil sharpener plugged into a wall outlet
A computer displaying an image on the screen
A battery-operated flashlight shining brightly
- 16. Multiple Choice
Energy transformation, also known as energy conversion is the process of energy changing from one form of energy into another. The device shown here converts one form of energy to another. What energy conversion is it designed to do?
Electrical to light
Light to motion
Electrical to motion
Motion to light
- 17. Multiple Choice
Which of the following energy transformations occurs when a lamp that is plugged into a wall socket is functioning correctly?
Chemical to light
Electrical to chemical
Electrical to light
Chemical to electrical
- 18. Multiple Choice
The device pictures here has a rechargeable battery and can play music through headphones. This device is designed to perform what kind of energy transformation?
Sound to light
Electrical to sound
Electrical to heat
Chemical to heat
- 19. Multiple Choice
Amber is observing a classroom device being used. She recorded the following energy transformation:
Electrical to Mechanical to Sound
Which device was Amber most likely observing?
A triple beam balance measuring an objects mass.
A pencil sharpener plugged into a wall outlet
A computer displaying an image on the screen
A battery-operated flashlight shining brightly
- 20. Multiple Choice
Energy transformation occur regularly in our lives as we actively or passively make use of energies and transform energies. The toaster illustrated here plugs into the wall and turns a piece of bread into toast. Which of the following best explains how it works?
It turns mechanical into light energy.
It gets chemical energy to the energy of motion.
It transform electrical energy to the energy of motion.
It transforms electrical energy into heat energy.
- 21. Multiple Choice
What is the result of moving an electrically charged object towards a second object of the same charge?
The second object will get smaller.
The second object will be pulled towards the other.
The second object will be pushed away from the other.
The second object will not move.
- 22. Multiple Choice
What can result from an electric charge?
a decrease in size
a pulling force
Nothing results from an electric charge.
an increase in size
- 23. Multiple Choice
What causes objects, such as pepper flakes, to move towards a charged balloon?
The pepper flakes have an opposite charge.
The pepper flakes are smaller than the balloon.
The pepper flakes have the same charge.
The pepper flakes have no charge.
- 24. Multiple Choice
What will be attracted to an electrically charged object?
a smaller object
a larger object
an object with the opposite charge
an object with the same charge
- 25. Multiple Choice
How can you add charge to a balloon?
rubbing it on something
letting air out of it
popping it
making it bigger
- 26. Multiple Choice
What energy transformation takes place in a solar oven?
sound energy to light
light energy to motion
electrical energy to heat
light energy to heat
- 27. Multiple Choice
What two components would be most useful in building a device that converts electrical energy to light energy?
a battery and a bulb
a candle and a match
a wire and a magnet
a spring and a weight
- 28. Multiple Choice
What type of energy is electrical energy transformed into by a lamp?
electrical and mechanical
mechanical and light
heat and light
heat and mechanical
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