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- 1. Multiple Choice
Students were instructed to design an electrical circuit that transforms chemical energy to electrical energy to sound energy. Which equipment must be included in their circuit?
battery, light bulb, switch
solar panel, door bell, battery
portable heater, wire, battery
battery, wire, buzzer
- 2. Multiple Choice
A student listens to the radio while doing homework. Which form of energy conversion occurs in the radio?
electrical to chemical energy
electrical to heat energy
electrical to mechanical energy
electrical to sound energy
- 3. Multiple Choice
Mrs. Jones needs to purchase an object from the home improvement store that will convert electrical energy into light energy when it is added to a circuit. Which object should Mrs. Jones buy?
bell
dishwasher
lamp
speaker
- 4. Multiple Choice
When turned on, a toaster will convert electrical energy into another form of energy. Into which form of energy does the toaster convert the electrical energy?
chemical energy
heat energy
mechanical energy
sound energy
- 5. Multiple Choice
A student notices that every time the button for the doorbell is pressed, the doorbell rings. As soon as the button is released, the doorbell stops ringing.
What kind of energy transformation takes place when the switch of the doorbell is pressed?
electrical energy to sound energy
mechanical energy to heat energy
chemical energy to electrical energy
electrical energy to chemical energy
- 6. Multiple Choice
A student connects a flashlight bulb to a battery using wires and leaves the bulb lit overnight, as shown in the image.
The next day, the student observes that the bulb has become dimmer, and by nighttime, it stops glowing. What can the student best infer from the observation?
The circuit became incomplete
The circuit remained complete
All light energy in the bulb was transformed to heat energy
All chemical energy in the battery was transformed to light and heat energy
- 7. Multiple Choice
Michelle has a robot that is powered by batteries. When the switch is on, the robot moves. The energy transformations that take place in the robot are shown in the flow chart.
What form of energy is X?
heat energy
light energy
sound energy
electrical energy
- 8. Multiple Choice
Use the diagram to answer the question.
Which energy transformations take place in this situation?
solar to electrical to mechanical
solar to chemical to electrical
heat to mechanical to electrical
heat to electrical to chemical
- 9. Multiple Choice
A lamp was turned on as shown in the diagram.
Which energy transformation occurred?
Chemical energy transformed into light and heat energy.
Electrical energy transformed into light and heat energy.
Heat energy transformed into light and electrical energy.
Light energy transformed into heat and chemical energy.
- 10. Multiple Choice
Which statement describes the relationship between electric generators and electric motors?
Both electric generators and electric motors use motion in a magnetic field to produce electric current.
Both electric generators and electric motors transform current from a magnetic field into mechanical energy.
Generators transform mechanical energy into electrical energy whereas electric motors transform electric energy into mechanical energy.
Generators transform electrical energy into mechanical energy whereas electric motors transform mechanical energy into electrical energy.
- 11. Multiple Choice
Which upgrade would have the greatest positive impact on Mississippi's power grid?
a smart grid that can react quickly to electricity demands
more power plants that can supply as much electricity to the grid as possible
more transmission lines to increase the amount of out-of-state electricity
a complex grid with more transformers and less efficiency
- 12. Multiple Choice
What is the specific role of a power plant in a power grid system?
to supply electricity to the system
to distribute electricity to houses
to convert low voltage electricity to high voltage
to convert alternating current to direct current
- 13. Multiple Choice
What is the best description of a generator in an electric power plant?
It converts electrical energy into mechanical energy.
It converts mechanical energy into electrical energy.
They are necessary in coal-fired power plants but not nuclear plants.
They are often used to produce steam to generate electricity.
- 14. Multiple Choice
Which source of energy is the easiest to convert directly by an electric generator?
coal
geothermal
petroleum
wind
- 15. Multiple Choice
An electromagnet can be created by wrapping a wire around a nail and attaching the two ends of the wire to a battery. What happens in an electromagnet?
Electrical energy transforms into mechanical energy.
Electrical energy produces a magnetic field.
Mechanical energy transforms into electrical energy.
Mechanical energy produces an electric field.
- 16. Multiple Choice
What type of machine converts electrical energy to mechanical energy using magnetism?
boiler
generator
motor
turbine
- 17. Multiple Choice
In some states, the law mandates that a new house has to be built with insulation in the walls. Why would this be important to have?
Cold outside air is prevented from getting inside the house.
Heat from the outside air is absorbed.
On cold days, it slows down the loss of heat.
Heat is generated to keep the house warm.
- 18. Multiple Choice
A metal spoon is used to stir hot chocolate in a ceramic mug. Which statement describes the direction of heat transfer that occurs?
from the spoon to the mug
from the mug to the spoon
from the spoon to the hot chocolate
from the hot chocolate to the spoon
- 19. Multiple Choice
Bailey gently places a few red food coloring crystals at the bottom of a glass beaker filled with water. She heats the beaker with a burner for a few minutes. She observes that the red color rises up. What causes the color to spread?
emissions caused by the heat
convection currents in the water
radiation caused by the flame
conduction in the glass beaker
- 20. Multiple Choice
Which form of energy transfer is most responsible for the creation of Earth’s air and ocean currents?
conduction
convection
insulation
radiation
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