Aha Trivia Stuff Everyone Should Know

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Stuff Every Energy Scout Should Know: free practice in 30-second cards

Stuff Every Energy Scout Should Know

Practice facts for the Energy merit badge. Not an official Scouting America credential.

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Free to start, no sign-up. 61 cards so far. One Knowledge Score and day streak across all your courses.

Questions people ask

Is this practice test free?

Yes. The first 50 cards are free for everyone with no sign-up, each with the answer, why it is right and its sources. Aha Trivia members get all 61 cards and timed practice exams.

How many practice questions are there?

61 practice questions so far. Each one is a 3-choice card that takes about 30 seconds, and the course grows as new cards pass our source checks.

Where do the answers come from?

Every card lists the sources it was checked against, and each answer explains why it is right. If you think an answer is wrong, tap "Challenge this answer" in the game and it gets reviewed.

Can I study in the car?

Yes. Voice mode reads the questions out loud and you answer by voice.

Try 3 cards

  1. What is the SI unit used to measure energy?
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    The joule. The joule is the International System unit for energy. The watt measures power, which is energy per unit of time.

  2. What does the law of conservation of energy say about an isolated system?
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    Total energy stays constant. In an isolated system, energy can change form but the total amount stays the same. It is never created or destroyed.

  3. A moving bicycle has which form of energy?
    Show the answer

    Kinetic energy. Kinetic energy comes from motion. A moving object carries kinetic energy because of its movement.

All 61 practice questions

The first 50 are free, with the answer, why it's right and the official sources. The other 11 (🔒) open with a membership (every test). Or play them as a game and track what you've learned.

Show all 61 questions
  1. What is the SI unit used to measure energy?
  2. What does the law of conservation of energy say about an isolated system?
  3. A moving bicycle has which form of energy?
  4. Energy stored because of an object's position is called what?
  5. What is the SI unit of power, equal to one joule per second?
  6. A kilowatt-hour equals about how many joules?
  7. Work in physics equals force multiplied by what?
  8. What is the primary energy carrier molecule in living cells?
  9. Which organelle generates chemical energy for a cell?
  10. Plants capture sunlight as chemical potential energy during which process?
  11. What mainly drives Earth's climate and ecosystem processes?
  12. What is a device that usefully changes energy between forms called?
  13. A battery changes chemical energy into which form?
  14. A hydroelectric dam converts gravitational potential energy into what first?
  15. According to the second law of thermodynamics, what happens in a heat engine cycle?
  16. When listing home energy types, which detail should you include?
  17. What should a pie chart of U.S. energy resources show?
  18. What does a chart of U.S. energy imports show?
  19. Which sectors does a U.S. energy use chart compare?
  20. What does a chart of fuels for U.S. electricity show?
  21. What does a chart of world primary energy reserves show?
  22. When explaining an energy system, what should you identify about its energy source?
  23. What should you do with an article about energy before discussing it with your counselor?
  24. After finishing other energy requirements, what should you do with your original article?
  25. When explaining a device's energy use, what should you describe?
  26. What should a system you construct make?
  27. What is one way to reduce energy waste in your community?
  28. What should you research about an energy career?
  29. What should you discuss with your counselor about an energy career?
  30. What is internal energy in thermodynamics?
  31. What does entropy measure in a system?
  32. What is the human equivalent (H-e) used for?
  33. What is basal metabolic rate?
  34. What does the second law of thermodynamics say about energy spreading?
  35. What does a toaster mainly change electrical energy into?
  36. A greenhouse lets sunlight in and traps what inside?
  37. A nuclear reactor releases energy from what kind of changes?
  38. Electric vehicles use stored battery energy to turn what?
  39. A bow drill makes heat by changing what kind of energy?
  40. A solar motor system changes sunlight into what first?
  41. A simple windmill changes moving air into what?
  42. A water wheel uses falling water to make what?
  43. In an energy system, what are the useful outcomes called?
  44. What is an energy loss in a system?
  45. When doing a home energy audit, what should you keep for 14 days?
  46. What does a sustainable energy source mean?
  47. How can reuse and recycling change your energy use?
  48. What is a trade-off in energy use?
  49. Why might people resist changes that reduce energy waste?
  50. What can reducing energy waste do for a community?
  51. How does cost affect use of a nonrenewable energy resource? 🔒
  52. What should you tell your counselor about your pie chart data? 🔒
  53. What is one technology that helps biomass or waste-to-energy plants? 🔒
  54. What is a cogeneration plant designed to do? 🔒
  55. What is being done to make fossil fuel power plants cleaner? 🔒
  56. Geothermal power plants use heat from where? 🔒
  57. What is one safety concern to research about energy systems? 🔒
  58. What is one environmental impact to consider for an energy system? 🔒
  59. Solar power systems are being improved to produce what? 🔒
  60. Ocean thermal energy conversion uses what difference? 🔒
  61. What is one prospect to research for an energy career? 🔒