Vocabulary
What is Energy?
A) The ability to do or change things
B) The function of a system
C) Something that runs on electricity
D) The solution to a problem
A) The ability to do or change things
When I turn on a music player I hear sound. Sound is the:
A) the output energy
B) the input energy
A) the output energy
People 500 years ago used electrical devices.
A) True
B) False
B) False
Which of the following is an example of an energy converter?
A) A table
B) A shelf
C) A toaster
D) A book
C) A toaster
In a system, what is "input energy"?
A) The energy leaving the system.
B) The energy that is being transferred.
C) The part of the system that breaks.
D) The energy going inside the system.
D) The energy going inside the system.
The energy being used by a system:
A) Input Energy
B) Output Energy
A) Input Energy
If there is not enough energy in a system, some devices might not work.
A) True
B) False
A) True
Which of the following is the best example of energy conversion?
A) Plugging in a fan and the blades spin.
B) An unplugged device.
C) A door opened
D) A book sitting on a desk.
A) Plugging in a fan and the blades spin.
What is an energy conversion?
A) Energy moving from one part of a system to another.
B) Energy changing from one form to another.
C) Energy being destroyed.
D) Energy being created.
B) Energy changing from one form to another.
When you flip on a light switch and the bulb turns on, what type of energy is being used?
A) Sound Energy
B) Electrical Energy
C) Light Energy Only
D) Heat Energy Only
B) Electrical Energy
Electrical energy is the input.
Electrical devices convert electrical energy into other energy forms.
A) True
B) False
Name two differences between LED light bulbs and incandesent light bulbs.
Example answers:
1) LED lights last longer than incandescent light bulbs.
2) LED lights use less energy than incandescent light bulbs.
3) LED lights are brighter than incandescent light bulbs.
4) Incandescent light bulbs are hotter than LED lights.
Engineers argue for one solution over others based on how well it meets:
A) Devices
B) Converters
C) Criteria
D) Energy
C) Criteria (the requirements for a solution)
Name two forms of energy output from a computer.
_________ and _________
Sound, Light
Also Acceptable:
Thermal (Heat)
The blackout in Ergstown happened because energy disappeared completely.
A) True
B) False
B) False
Ergstown is experiencing several blackouts because there is not enough electrical energy for the whole city. The engineers want to fix the blackouts by using less electrical energy in the city, without changing how people use their electrical devices.
What is the best solution?
A) Get people to stop using some devices.
B) Replace older street lights with LED streetlights.
B) Ergstown should replace older street lights with LED street lights because the LED street lights use less energy than the old street lights. I observed in the sim, that LED street lights used less energy to produce the same amount of light as the old light bulbs. This way people would not have to change the way they use their electrical devices.