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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 685 · 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: yeast is not needed for the turmeric test. (a) False (b) True
  2. 2.True or false: vinegar is neutral. (a) True (b) False
  3. 3.True or false: soap solution is a base. (a) True (b) False
  4. 4.🔍 Which is the odd one out? (a) sugar water (b) plain water (c) soap solution (d) lemon juice
  5. 5.True or false: soap solution is neutral. (a) True (b) False
  6. 6.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
  8. 8.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the liquid we test (c) the colour we see
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) a dropper or spoon (c) white paper strips (d) lemon juice
  11. 11.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is hot (d) soap is an acid
  12. 12.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) lemon juice (c) salt water (d) plain water
  13. 13.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
  15. 15.🧺 Which of these is needed for the turmeric test? (a) yeast (b) soap solution (c) a magnet (d) a mirror
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
  17. 17.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) mix bathroom cleaners (d) sip each liquid
  18. 18.🧺 Which of these is not needed for the turmeric test? (a) water (b) lemon juice (c) white paper strips (d) a balloon
  19. 19.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  20. 20.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  21. 21.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  22. 22.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
  23. 23.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
  24. 24.🫧 Which of these is an acid? (a) sugar water (b) detergent water (c) lemon juice (d) soap solution
  25. 25.🫧 Which of these is neutral? (a) vinegar (b) plain water (c) detergent water (d) tamarind water
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  27. 27.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  28. 28.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  29. 29.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  30. 30.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the turmeric paper (c) the number of drops (d) the liquid we test
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
  33. 33.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  34. 34.True or false: baking soda water is neutral. (a) True (b) False
  35. 35.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  36. 36.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  37. 37.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  38. 38.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) tamarind water (d) soap solution
  39. 39.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) reddish-brown (d) green
  40. 40.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) salt water

Answer key

  1. True
  2. False
  3. True
  4. soap solution
  5. False
  6. stays yellow
  7. we keep it the same
  8. False
  9. the number of drops
  10. a balloon
  11. soap water is a base
  12. soap solution
  13. not needed
  14. we change it
  15. soap solution
  16. we keep it the same
  17. use only kitchen items
  18. a balloon
  19. turns reddish-brown
  20. needed
  21. not needed
  22. it stays yellow
  23. reddish
  24. lemon juice
  25. plain water
  26. False
  27. False
  28. an acid
  29. False
  30. a base
  31. the liquid we test
  32. the turmeric paper
  33. needed
  34. False
  35. True
  36. turns reddish-brown
  37. True
  38. tamarind water
  39. reddish-brown
  40. salt water

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