Aha Trivia Stuff Everyone Should Know

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

Stuff Every Chemistry Scout Should Know

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

Start Stuff Every Chemistry Scout Should Know ⚡ Today's sprint 🎙️ Voice mode

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Free to start, no sign-up. 55 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 55 cards and timed practice exams.

How many practice questions are there?

55 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 does a Safety Data Sheet (SDS) tell you about a chemical?
    Show the answer

    Its properties and hazards. An SDS lists a chemical's properties, hazards, handling, disposal, and toxicity information.

  2. Why might you wear gloves and goggles when handling a chemical?
    Show the answer

    To protect skin and eyes from exposure. Personal protective equipment shields your body from chemical exposure, depending on toxicity and route of exposure.

  3. What do hazard pictograms on an SDS container show?
    Show the answer

    Warnings about dangers. Pictograms are symbols that warn about specific hazards like flammability or toxicity.

All 55 practice questions

The first 50 are free, with the answer, why it's right and the official sources. The other 5 (🔒) open with a membership (every test). Or play them as a game and track what you've learned.

Show all 55 questions
  1. What does a Safety Data Sheet (SDS) tell you about a chemical?
  2. Why might you wear gloves and goggles when handling a chemical?
  3. What do hazard pictograms on an SDS container show?
  4. Why should chemicals be stored safely at home and school?
  5. Why is soap better than water alone for washing oily hands?
  6. Why is rubbing alcohol used to clean small cuts?
  7. What happens to food molecules during the Maillard browning reaction?
  8. What can red cabbage juice be used for?
  9. Why compare different waterproofing treatments before choosing one?
  10. What are the four classes of fires based on?
  11. How can baking soda help put out a small fire?
  12. Why should flame tests be done only with qualified supervision?
  13. What is nylon synthesis an example of?
  14. How can chemistry reduce the impact of single-use water bottles?
  15. What does organic chemistry study?
  16. What does analytical chemistry help you do?
  17. What is biochemistry the study of?
  18. What is an atom's dense center called?
  19. What makes one element different from another?
  20. What is a compound?
  21. What is a mixture?
  22. What does the mole measure in chemistry?
  23. What are the three familiar phases of matter?
  24. What happens in an ionic bond?
  25. What is a covalent bond?
  26. What is an exothermic reaction?
  27. What is activation energy?
  28. What is an ion?
  29. According to Arrhenius theory, what does an acid produce in water?
  30. What does a low pH tell you about a solution?
  31. What happens during oxidation?
  32. What is chemical equilibrium?
  33. What is matter defined as in chemistry?
  34. What are atoms of the same element with different mass numbers called?
  35. What does physical chemistry study?
  36. What is materials chemistry focused on?
  37. What is inorganic chemistry mainly concerned with?
  38. Why is chemistry called the central science?
  39. What can spectroscopy help scientists do?
  40. What is a pure chemical substance?
  41. What is the smallest unit that keeps an element's chemical properties?
  42. What is a molecule?
  43. What is the mass number of an atom?
  44. Which elements are composed of lone atoms?
  45. What is molar concentration?
  46. What is the octet rule about?
  47. What is an exergonic reaction?
  48. What is an endothermic reaction?
  49. What is a cation?
  50. What is an anion?
  51. According to Bronsted-Lowry theory, what does an acid do? 🔒
  52. According to Lewis theory, what is an acid? 🔒
  53. What did Antoine Lavoisier develop? 🔒
  54. What did John Dalton propose? 🔒
  55. Who developed the modern periodic table in the 1860s? 🔒