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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 350 · 40 questions
TalentJR

What you do (Yellow or red?): 1. Mix turmeric powder with a little water into a paste and paint it on white paper strips; let them dry. 2. Put a drop of soap solution on one strip and a drop of lemon juice on another. 3. Write down the colour each drop makes. 4. Add lemon juice to the reddish spot and watch it change back.

NameDateTime takenScore ___ / 40
  1. 1.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  3. 3.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the liquid we test (d) the colour we see
  5. 5.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  6. 6.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) bright blue (d) reddish
  7. 7.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  8. 8.True or false: orange juice is an acid. (a) False (b) True
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  10. 10.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
  12. 12.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
  13. 13.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) water (c) soap solution (d) turmeric powder
  14. 14.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  15. 15.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  16. 16.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) green (d) bright blue
  17. 17.True or false: plain water is neutral. (a) True (b) False
  18. 18.🫧 Which of these is neutral? (a) sugar water (b) detergent water (c) soap solution (d) vinegar
  19. 19.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) detergent water (c) soap solution (d) baking soda water
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) lemon juice (d) soap solution
  21. 21.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  22. 22.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  23. 23.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  25. 25.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a comb (c) soap solution (d) white paper strips
  28. 28.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  29. 29.🫧 Which of these is an acid? (a) detergent water (b) orange juice (c) soap solution (d) salt water
  30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a balloon (c) lemon juice (d) turmeric powder
  31. 31.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a mirror (c) lemon juice (d) a battery cell
  32. 32.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
  33. 33.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  34. 34.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns blue (d) it turns yellow again
  35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) a magnet (d) soap solution
  36. 36.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  37. 37.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  38. 38.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a dropper or spoon (c) lemon juice (d) a balloon
  39. 39.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  40. 40.🧺 Do we need water for the turmeric test? (a) needed (b) not needed

Answer key

  1. False
  2. False
  3. turns reddish-brown
  4. the liquid we test
  5. False
  6. reddish
  7. True
  8. True
  9. we measure it
  10. lemon juice
  11. we keep it the same
  12. reddish-brown
  13. a magnet
  14. False
  15. False
  16. reddish-brown
  17. True
  18. sugar water
  19. sugar water
  20. soap solution
  21. False
  22. an acid
  23. not needed
  24. True
  25. True
  26. False
  27. a comb
  28. turns reddish-brown
  29. orange juice
  30. a balloon
  31. lemon juice
  32. use only kitchen items
  33. not needed
  34. it turns yellow again
  35. a magnet
  36. an acid
  37. not needed
  38. a balloon
  39. neutral
  40. needed

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