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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 361 · 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: plain water is neutral. (a) True (b) False
  2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  4. 4.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) a dropper or spoon (d) soap solution
  5. 5.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  7. 7.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) water (d) a comb
  9. 9.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
  10. 10.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  11. 11.True or false: sugar water is a base. (a) True (b) False
  12. 12.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  13. 13.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) lemon juice (c) yeast (d) water
  14. 14.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  15. 15.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  16. 16.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  17. 17.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) lemon juice (d) detergent water
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) yeast (c) white paper strips (d) water
  19. 19.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  20. 20.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  21. 21.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) bright blue (c) green (d) it stays white
  22. 22.🫧 Which of these is an acid? (a) curd (b) baking soda water (c) plain water (d) sugar water
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  24. 24.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  25. 25.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  26. 26.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) use only kitchen items (d) sip each liquid
  27. 27.True or false: water is needed for the turmeric test. (a) False (b) True
  28. 28.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  29. 29.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  30. 30.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  31. 31.🫧 Which of these is an acid? (a) salt water (b) tamarind water (c) sugar water (d) soap solution
  32. 32.True or false: salt water is a base. (a) True (b) False
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  34. 34.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a mirror (c) water (d) a balloon
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  36. 36.True or false: soap solution is an acid. (a) False (b) True
  37. 37.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  38. 38.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  39. 39.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  40. 40.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base

Answer key

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

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